for the most part, deal with filter rules UI

classes/labels.php

classes/pref/filters.php

classes/rpc.php

include/controls.php

js/CommonFilters.js

plugins/auto_assign_labels/init.php

themes/compact.css

themes/compact_night.css

themes/light.css

themes/light/tt-rss.less

themes/night.css

themes/night_blue.css