Taking things from the LootUI to the StatusUI works way better now and there's a DropTarget to match the GrabSource.

gui/event_router.cpp

@@ -65,7 +65,7 @@ namespace gui {
           set_event(gui::Event::KEY_PRESS);
           break;
         default:
-          dbc::sentinel("invalid event");
+          dbc::sentinel(fmt::format("invalid event: {}", int(ev)));
       }
     }