Fix “Last Refresh” filter and assertion failures
Fix “Last Refresh” filter and assertion failures

- only connections in order to refresh feeds should impact refresh status
- we handle MA_Notify_RefreshStatus notifications on time through use of -postNotificationName:object: instead of -postNotificationOnMainThreadWithName:object:

This also fixes the animation in the progress toolbar button.
ViennaRSS/vienna-rss,barijaona/vienna-rss,barijaona/vienna-rss,josh64x2/vienna-rss,dak180/vienna,tothgy/vienna-rss,barijaona/vienna-rss,Eitot/vienna-rss,tothgy/vienna-rss,josh64x2/vienna-rss,tothgy/vienna-rss,lapcat/vienna-rss,Eitot/vienna-rss,ViennaRSS/vienna-rss,lapcat/vienna-rss,Eitot/vienna-rss,Eitot/vienna-rss,ViennaRSS/vienna-rss,lapcat/vienna-rss,tothgy/vienna-rss,dak180/vienna,josh64x2/vienna-rss,josh64x2/vienna-rss,lapcat/vienna-rss,josh64x2/vienna-rss,ViennaRSS/vienna-rss,barijaona/vienna-rss,barijaona/vienna-rss,dak180/vienna,ViennaRSS/vienna-rss,dak180/vienna