fix: Allow copy of excalidraw elements only when inside excalidraw (#3206)

* fix: Allow copy event only inside canvas

* use pointerdown

* use document.getSelection

* remove poiterdown

* remove keyTest

* update changelog

src/actions/actionClipboard.tsx

@@ -17,7 +17,7 @@ export const actionCopy = register({
     };
   },
   contextItemLabel: "labels.copy",
-  keyTest: (event) => event[KEYS.CTRL_OR_CMD] && event.code === CODES.C,
+  // Don't assign keyTest since its handled via copy event
 });
 
 export const actionCut = register({