Support new GNOME guidelines for the primary menu
Sort articles by date by default
Make backend plugins share some code and make OPML import work for all backend plugins
Various improvements to how translations work
Make "Oldest First" article sorting work in both Unread and All tabs
Improve error message when trying to add a feed that already exists
Don't close the currently open article when changing tabs if the new article is on the new tab
Use the system default "document" font as the default article font
Local and DecSync: Assume RSS feeds are UTF-8 unless they explicitly list a different locale
Local and DecSync: Use the RSS feed link to deduplicate feeds, not the link element in the feed
TT-RSS: Fix another crash when TT-RSS sends us data with an unexpected types
Feedly: Minor improvements to CLi logs
