* Refactor uses of icons to an Icon component in web UI
* Refactor options passed to the Icon component
* Make tests work with absolute component paths
* create FilterBar componer and its container, unstyled
* introduce basic styling for FilterBar
* add selection css
* allow FilterBar to display active CSS with js
* connect the FilterBar to the Redux state
* change getNotifications to use filter
* remove temporary comments
* add an option to turn the FilterBar off in settings
* fix showFilterBar data type to boolean
* fix eslint errors
* add English and Polish translations
* allowed filter bar overflow to accomodate for longer languages
* fix mispelled translation key
* add unified CSS look
* replace text in FilterBar with icons
* add tooltips
* replace text @ with an icon
* introduce simple and advanced filtering view
* add ability to toggle the advanced view
* add Polish translations
* change Advanced View description to be more clear
* make each filter flush notifications and load new ones, fixing pagination
* simplify getNotifications once frontend filtering is not needed for FilterBar
* add a semicolon
* Revert "simplify getNotifications once frontend filtering is not needed for FilterBar"
This reverts commit 9f4be7857135b0327814bd22a3e8a4e7b546f7cc.
* reset filter to 'all' when turning off FilterBar
Eugen Rochko