Add shortcut for removing game

data/gtk/help-overlay.blp

@@ -58,6 +58,11 @@ ShortcutsWindow help_overlay {
         title: _("Show hidden games");
         action-name: "win.show_hidden";
       }
+
+      ShortcutsShortcut {
+        title: _("Remove game");
+        action-name: "app.remove_game_overview";
+      }
     }
   }
 }