diff --git a/InvenTree/order/serializers.py b/InvenTree/order/serializers.py
index 809dd0e8fb..4a95bbb166 100644
--- a/InvenTree/order/serializers.py
+++ b/InvenTree/order/serializers.py
@@ -132,7 +132,7 @@ class POLineItemSerializer(InvenTreeModelSerializer):
 
     purchase_price_string = serializers.CharField(source='purchase_price', read_only=True)
 
-    destination = LocationBriefSerializer(source='get_destination', read_only=True)
+    destination_detail = LocationBriefSerializer(source='get_destination', read_only=True)
 
     purchase_price_currency = serializers.ChoiceField(
         choices=currency_code_mappings(),
@@ -156,6 +156,7 @@ class POLineItemSerializer(InvenTreeModelSerializer):
             'purchase_price_currency',
             'purchase_price_string',
             'destination',
+            'destination_detail',
         ]
 
 
diff --git a/InvenTree/order/templates/order/order_base.html b/InvenTree/order/templates/order/order_base.html
index f1146d8b01..11396e07a7 100644
--- a/InvenTree/order/templates/order/order_base.html
+++ b/InvenTree/order/templates/order/order_base.html
@@ -170,6 +170,7 @@ $("#edit-order").click(function() {
             supplier: {
             },
             {% endif %}
+            supplier_reference: {},
             description: {},
             target_date: {
                 icon: 'fa-calendar-alt',
diff --git a/InvenTree/order/templates/order/purchase_order_detail.html b/InvenTree/order/templates/order/purchase_order_detail.html
index 54d0ca76be..193fd75daa 100644
--- a/InvenTree/order/templates/order/purchase_order_detail.html
+++ b/InvenTree/order/templates/order/purchase_order_detail.html
@@ -401,8 +401,15 @@ $("#po-table").inventreeTable({
             }
         },
         {
-            field: 'destination.pathstring',
+            field: 'destination',
             title: '{% trans "Destination" %}',
+            formatter: function(value, row) {
+                if (value) {
+                    return renderLink(row.destination_detail.pathstring, `/stock/location/${value}/`);
+                } else {
+                    return '-';
+                }
+            }
         },
         {
             field: 'notes',
diff --git a/InvenTree/order/templates/order/sales_order_base.html b/InvenTree/order/templates/order/sales_order_base.html
index 7a2c63c5a6..60099a2578 100644
--- a/InvenTree/order/templates/order/sales_order_base.html
+++ b/InvenTree/order/templates/order/sales_order_base.html
@@ -163,6 +163,7 @@ $("#edit-order").click(function() {
             customer: {
             },
             {% endif %}
+            customer_reference: {},
             description: {},
             target_date: {
                 icon: 'fa-calendar-alt',
diff --git a/InvenTree/part/api.py b/InvenTree/part/api.py
index 9abee816fa..3a5fee4e3d 100644
--- a/InvenTree/part/api.py
+++ b/InvenTree/part/api.py
@@ -118,9 +118,17 @@ class CategoryList(generics.ListCreateAPIView):
 
     ordering_fields = [
         'name',
+        'level',
+        'tree_id',
+        'lft',
     ]
 
-    ordering = 'name'
+    # Use hierarchical ordering by default
+    ordering = [
+        'tree_id',
+        'lft',
+        'name'
+    ]
 
     search_fields = [
         'name',
diff --git a/InvenTree/part/serializers.py b/InvenTree/part/serializers.py
index 6627639bca..92dda58590 100644
--- a/InvenTree/part/serializers.py
+++ b/InvenTree/part/serializers.py
@@ -32,6 +32,8 @@ class CategorySerializer(InvenTreeModelSerializer):
 
     parts = serializers.IntegerField(source='item_count', read_only=True)
 
+    level = serializers.IntegerField(read_only=True)
+
     class Meta:
         model = PartCategory
         fields = [
@@ -40,10 +42,11 @@ class CategorySerializer(InvenTreeModelSerializer):
             'description',
             'default_location',
             'default_keywords',
-            'pathstring',
-            'url',
+            'level',
             'parent',
             'parts',
+            'pathstring',
+            'url',
         ]
 
 
diff --git a/InvenTree/stock/api.py b/InvenTree/stock/api.py
index 08e948607a..70ab939ff1 100644
--- a/InvenTree/stock/api.py
+++ b/InvenTree/stock/api.py
@@ -363,6 +363,15 @@ class StockLocationList(generics.ListCreateAPIView):
     ordering_fields = [
         'name',
         'items',
+        'level',
+        'tree_id',
+        'lft',
+    ]
+
+    ordering = [
+        'tree_id',
+        'lft',
+        'name',
     ]
 
 
diff --git a/InvenTree/stock/serializers.py b/InvenTree/stock/serializers.py
index 38301bdd1f..a175787c63 100644
--- a/InvenTree/stock/serializers.py
+++ b/InvenTree/stock/serializers.py
@@ -260,12 +260,15 @@ class LocationSerializer(InvenTreeModelSerializer):
 
     items = serializers.IntegerField(source='item_count', read_only=True)
 
+    level = serializers.IntegerField(read_only=True)
+
     class Meta:
         model = StockLocation
         fields = [
             'pk',
             'url',
             'name',
+            'level',
             'description',
             'parent',
             'pathstring',
diff --git a/InvenTree/templates/js/modals.js b/InvenTree/templates/js/modals.js
index b404af364c..4bcc31fffa 100644
--- a/InvenTree/templates/js/modals.js
+++ b/InvenTree/templates/js/modals.js
@@ -765,6 +765,9 @@ function attachSecondaryModal(modal, options) {
 function attachSecondaries(modal, secondaries) {
     /* Attach a provided list of secondary modals */
 
+    // 2021-07-18 - Secondary modals will be disabled for now, until they are re-implemented in the "API forms" architecture
+    return;
+
     for (var i = 0; i < secondaries.length; i++) {
         attachSecondaryModal(modal, secondaries[i]);
     }
diff --git a/InvenTree/templates/js/model_renderers.js b/InvenTree/templates/js/model_renderers.js
index caa209dc90..ddb4897d8d 100644
--- a/InvenTree/templates/js/model_renderers.js
+++ b/InvenTree/templates/js/model_renderers.js
@@ -67,7 +67,9 @@ function renderStockItem(name, data, parameters, options) {
 // Renderer for "StockLocation" model
 function renderStockLocation(name, data, parameters, options) {
 
-    var html = `<span>${data.name}</span>`;
+    var level = '- '.repeat(data.level);
+
+    var html = `<span>${level}${data.pathstring}</span>`;
 
     if (data.description) {
         html += ` - <i>${data.description}</i>`;
@@ -75,10 +77,6 @@ function renderStockLocation(name, data, parameters, options) {
 
     html += `<span class='float-right'>{% trans "Location ID" %}: ${data.pk}</span>`;
 
-    if (data.pathstring) {
-        html += `<p><small>${data.pathstring}</small></p>`;
-    }
-
     return html;
 }
 
@@ -154,7 +152,9 @@ function renderOwner(name, data, parameters, options) {
 // Renderer for "PartCategory" model
 function renderPartCategory(name, data, parameters, options) {
 
-    var html = `<span><b>${data.name}</b></span>`;
+    var level = '- '.repeat(data.level);
+
+    var html = `<span>${level}${data.pathstring}</span>`;
 
     if (data.description) {
         html += ` - <i>${data.description}</i>`;
@@ -162,10 +162,6 @@ function renderPartCategory(name, data, parameters, options) {
 
     html += `<span class='float-right'>{% trans "Category ID" %}: ${data.pk}</span>`;
 
-    if (data.pathstring) {
-        html += `<p><small>${data.pathstring}</small></p>`;
-    }
-
     return html;
 }
 
diff --git a/InvenTree/templates/js/order.js b/InvenTree/templates/js/order.js
index 5cb286e970..7091eb0577 100644
--- a/InvenTree/templates/js/order.js
+++ b/InvenTree/templates/js/order.js
@@ -14,6 +14,7 @@ function createSalesOrder(options={}) {
             customer: {
                 value: options.customer,
             },
+            customer_reference: {},
             description: {},
             target_date: {
                 icon: 'fa-calendar-alt',
@@ -44,6 +45,7 @@ function createPurchaseOrder(options={}) {
             supplier: {
                 value: options.supplier,
             },
+            supplier_reference: {},
             description: {},
             target_date: {
                 icon: 'fa-calendar-alt',