fix(rerendering): reduce the re-rendering of the viewport grid (#3558)

platform/ui/src/components/ContextMenu/ContextMenu.tsx

@@ -36,7 +36,7 @@ ContextMenu.propTypes = {
       label: PropTypes.string.isRequired,
       action: PropTypes.func.isRequired,
     })
-  ).isRequired,
+  ),
 };
 
 export default ContextMenu;

platform/ui/src/components/SplitButton/SplitButton.tsx

@@ -184,7 +184,10 @@ const SplitButton = ({
   const listItemRenderer = renderer || DefaultListItemRenderer;
 
   return (
-    <OutsideClickHandler onOutsideClick={outsideClickHandler}>
+    <OutsideClickHandler
+      onOutsideClick={outsideClickHandler}
+      disabled={!state.isExpanded}
+    >
       <div name="SplitButton" className="relative">
         <div
           className={classes.Button({