Broadcast mouse activity (#1175)

* broadcast mouse activity

* move to same MOUSE_LOCATION event

* remove key up handler

* update tests

* Fix border

* refactor

* rename activity to button

Co-authored-by: Panayiotis Lipiridis <lipiridis@gmail.com>

src/data/index.ts

@@ -49,6 +49,7 @@ export type SocketUpdateDataSource = {
     payload: {
       socketID: string;
       pointerCoords: { x: number; y: number };
+      button: "down" | "up";
       selectedElementIds: AppState["selectedElementIds"];
     };
   };