added ‘move’ option to the sprite context menu

lets the user move (nested) sprites in edit mode without changing their
layering, and also sprites marked “undraggable”

history.txt

@@ -2245,3 +2245,4 @@ ______
 * Objects, GUI: duplicate and clone nested sprites
 * GUI, Store: export and import nested sprites
 * Objects: double clicking on a sprite in the stage selects it in the IDE
+* Objects: added ‘move’ option to the sprite context menu, lets the user move (nested) sprites in edit mode without changing their layering, and also sprites marked “undraggable” 

objects.js

@@ -2618,6 +2618,7 @@ SpriteMorph.prototype.userMenu = function () {
     }
     menu.addItem("duplicate", 'duplicate');
     menu.addItem("delete", 'remove');
+    menu.addItem("move", 'move');
     menu.addItem("edit", 'edit');
     menu.addLine();
     if (this.anchor) {