Revert "wayland: remove outdated comment"

This reverts commit d75cfef49c.

video/out/wayland_common.c

@@ -313,6 +313,8 @@ static void pointer_handle_enter(void *data,
     wl->cursor.serial = serial;
     wl->cursor.pointer = pointer;
 
+    /* Release the left button on pointer enter again
+     * because after moving the shell surface no release event is sent */
     show_cursor(wl);
 }