Canvas: Improve disabled inline editing UX (#58610)

public/app/features/canvas/runtime/scene.tsx

@@ -478,7 +478,7 @@ export class Scene {
         this.selecto.getSelectedTargets()[0].style.cursor = 'grabbing';
       }
 
-      if (isTargetMoveableElement || isTargetAlreadySelected) {
+      if (isTargetMoveableElement || isTargetAlreadySelected || !this.isEditingEnabled) {
         // Prevent drawing selection box when selected target is a moveable element or already selected
         event.stop();
       }