restore custom palettes when activating a scene

HISTORY.md

@@ -33,6 +33,7 @@
 * store: serialize user defined block palettes
 * objects: enabled custom categories for the stage
 * store: load user defined palettes
+* gui: restore custom palettes when activating a scene
 
 ### 2021-07-21
 * user defined custom block palettes, under construction

snap.html

@@ -20,7 +20,7 @@
         <script src="src/threads.js?version=2021-07-20"></script>
         <script src="src/objects.js?version=2021-07-22"></script>
         <script src="src/scenes.js?version=2021-07-21"></script>
-        <script src="src/gui.js?version=2021-07-21"></script>
+        <script src="src/gui.js?version=2021-07-22"></script>
         <script src="src/paint.js?version=2021-07-05"></script>
         <script src="src/lists.js?version=2021-07-19"></script>
         <script src="src/byob.js?version=2021-07-21"></script>

src/gui.js

@@ -85,7 +85,7 @@ Animation, BoxMorph, BlockDialogMorph, RingMorph, Project, ZERO, BLACK*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2021-July-21';
+modules.gui = '2021-July-22';
 
 // Declarations
 
@@ -5717,7 +5717,12 @@ IDE_Morph.prototype.switchToScene = function (scene, refreshAlbum) {
     });
     scene.applyGlobalSettings();
     if (!this.setUnifiedPalette(scene.unifiedPalette)) {
+        this.createCategories();
+        this.createPaletteHandle();
+        this.categories.fixLayout();
+        this.fixLayout();
         this.flushBlocksCache();
+        this.currentSprite.palette(this.currentCategory);
         this.refreshPalette(true);
     }
     this.world().keyboardFocus = this.stage;