Hide legend button Option 2 (#3797)

@psychedelicious 
This version I added a toggle button to the viewport controls to
show/hide the legend

![image](https://github.com/invoke-ai/InvokeAI/assets/115216705/f74ea273-e043-4104-921d-76861bd69841)

Option 1
https://github.com/invoke-ai/InvokeAI/pull/3790

invokeai/frontend/web/src/features/nodes/components/ViewportControls.tsx

@@ -2,9 +2,12 @@ import { ButtonGroup } from '@chakra-ui/react';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import IAIIconButton from 'common/components/IAIIconButton';
 import { memo, useCallback } from 'react';
-import { FaCode, FaExpand, FaMinus, FaPlus } from 'react-icons/fa';
+import { FaCode, FaExpand, FaMinus, FaPlus, FaInfo } from 'react-icons/fa';
 import { useReactFlow } from 'reactflow';
-import { shouldShowGraphOverlayChanged } from '../store/nodesSlice';
+import {
+  shouldShowGraphOverlayChanged,
+  shouldShowFieldTypeLegendChanged,
+} from '../store/nodesSlice';
 
 const ViewportControls = () => {
   const { zoomIn, zoomOut, fitView } = useReactFlow();
@@ -12,6 +15,9 @@ const ViewportControls = () => {
   const shouldShowGraphOverlay = useAppSelector(
     (state) => state.nodes.shouldShowGraphOverlay
   );
+  const shouldShowFieldTypeLegend = useAppSelector(
+    (state) => state.nodes.shouldShowFieldTypeLegend
+  );
 
   const handleClickedZoomIn = useCallback(() => {
     zoomIn();
@@ -29,6 +35,10 @@ const ViewportControls = () => {
     dispatch(shouldShowGraphOverlayChanged(!shouldShowGraphOverlay));
   }, [shouldShowGraphOverlay, dispatch]);
 
+  const handleClickedToggleFieldTypeLegend = useCallback(() => {
+    dispatch(shouldShowFieldTypeLegendChanged(!shouldShowFieldTypeLegend));
+  }, [shouldShowFieldTypeLegend, dispatch]);
+
   return (
     <ButtonGroup isAttached orientation="vertical">
       <IAIIconButton
@@ -52,6 +62,12 @@ const ViewportControls = () => {
         aria-label="Show/Hide Graph"
         icon={<FaCode />}
       />
+      <IAIIconButton
+        isChecked={shouldShowFieldTypeLegend}
+        onClick={handleClickedToggleFieldTypeLegend}
+        aria-label="Show/Hide Field Type Legend"
+        icon={<FaInfo />}
+      />
     </ButtonGroup>
   );
 };

invokeai/frontend/web/src/features/nodes/components/panels/TopRightPanel.tsx

@@ -9,10 +9,13 @@ const TopRightPanel = () => {
   const shouldShowGraphOverlay = useAppSelector(
     (state: RootState) => state.nodes.shouldShowGraphOverlay
   );
+  const shouldShowFieldTypeLegend = useAppSelector(
+    (state: RootState) => state.nodes.shouldShowFieldTypeLegend
+  );
 
   return (
     <Panel position="top-right">
-      <FieldTypeLegend />
+      {shouldShowFieldTypeLegend && <FieldTypeLegend />}
       {shouldShowGraphOverlay && <NodeGraphOverlay />}
     </Panel>
   );

invokeai/frontend/web/src/features/nodes/store/nodesSlice.ts

@@ -32,6 +32,7 @@ export type NodesState = {
   invocationTemplates: Record<string, InvocationTemplate>;
   connectionStartParams: OnConnectStartParams | null;
   shouldShowGraphOverlay: boolean;
+  shouldShowFieldTypeLegend: boolean;
   editorInstance: ReactFlowInstance | undefined;
 };
 
@@ -42,6 +43,7 @@ export const initialNodesState: NodesState = {
   invocationTemplates: {},
   connectionStartParams: null,
   shouldShowGraphOverlay: false,
+  shouldShowFieldTypeLegend: false,
   editorInstance: undefined,
 };
 
@@ -125,6 +127,12 @@ const nodesSlice = createSlice({
     shouldShowGraphOverlayChanged: (state, action: PayloadAction<boolean>) => {
       state.shouldShowGraphOverlay = action.payload;
     },
+    shouldShowFieldTypeLegendChanged: (
+      state,
+      action: PayloadAction<boolean>
+    ) => {
+      state.shouldShowFieldTypeLegend = action.payload;
+    },
     nodeTemplatesBuilt: (
       state,
       action: PayloadAction<Record<string, InvocationTemplate>>
@@ -161,6 +169,7 @@ export const {
   connectionStarted,
   connectionEnded,
   shouldShowGraphOverlayChanged,
+  shouldShowFieldTypeLegendChanged,
   nodeTemplatesBuilt,
   nodeEditorReset,
   imageCollectionFieldValueChanged,