fixme: decrement button after thread closes

dzgui/controllers/emitter.py

@@ -139,3 +139,5 @@ class Emitter(GObject.GObject):
     @GObject.Signal(flags=GObject.SignalFlags.RUN_LAST, arg_types=(str,))
     def keyword_set(self, keyword: str) -> None:
         pass
+
+    # TODO: if servers fail to load, may leave dangling widgets waiting for a signal