Fix for https://forums.cocoaforge.com/viewtopic.php?f=18&t=26842
Fix for https://forums.cocoaforge.com/viewtopic.php?f=18&t=26842

This is preferable to the previous code,
because now there is no chance the user could select a new article while the folder is reloading.

josh64x2/vienna-rss,barijaona/vienna-rss,Eitot/vienna-rss,barijaona/vienna-rss,barijaona/vienna-rss,josh64x2/vienna-rss,ViennaRSS/vienna-rss,ViennaRSS/vienna-rss,lapcat/vienna-rss,lapcat/vienna-rss,ViennaRSS/vienna-rss,Eitot/vienna-rss,lapcat/vienna-rss,barijaona/vienna-rss,ViennaRSS/vienna-rss,Eitot/vienna-rss,josh64x2/vienna-rss,lapcat/vienna-rss,josh64x2/vienna-rss,barijaona/vienna-rss,ViennaRSS/vienna-rss,Eitot/vienna-rss,josh64x2/vienna-rss