Fixed context permissions for superuser with no group assigned

InvenTree/InvenTree/context.py

@@ -7,6 +7,8 @@ Provides extra global data to all templates.
 from InvenTree.status_codes import SalesOrderStatus, PurchaseOrderStatus
 from InvenTree.status_codes import BuildStatus, StockStatus
 
+from users.models import RuleSet
+
 
 def status_codes(request):
 
@@ -38,6 +40,15 @@ def user_roles(request):
     roles = {
     }
 
+    if user.is_superuser:
+        for ruleset in RuleSet.RULESET_MODELS.keys():
+            roles[ruleset] = {
+                'view': True,
+                'add': True,
+                'change': True,
+                'delete': True,
+            }
+    else:
         for group in user.groups.all():
             for rule in group.rule_sets.all():