Window is no longer a fiber, should prevent window from locking up due to a fiber not yielding, replaced ui's direct async calls with BackgroundWorker.foreground_job, show pulsing circle behind app logo on boot

lib/window.rb

@@ -23,9 +23,6 @@ class W3DHub
       super
 
       Store.application_manager.start_next_available_task if Store.application_manager.idle?
-
-      current = Async::Task.current?
-      current&.yield
     end
 
     def gain_focus
@@ -64,4 +61,4 @@ class W3DHub
       end
     end
   end
-end
+end