to show that some longer action was running you could use some code like this in the past:
mw.progress.start() # some action mw.progress.finish()
Up to version .44 this code in an add-on gave you a spinning wheel while the action was running, after .45+ this rotating wheel is no longer shown so that there’s no feedback that the action is running.
How would you fix the code for .45+? Is there another add-on that actually shows the rotating wheel during longer running actions on versions .45+?