* Issue tuskyapp#762 add clear notifications button to the top of the Notifications adapter
* Issue tuskyapp#764 add the notifications filter
* Update notifications top bar buttons
* Replace PopupMenu with PopupWindow. Save notifications filter to the account table
* Disable hide top bar on empty content at the notification screen
* Add app bar behavior to the sw640 notification layout
* Fix issue with click on top notification tab
* upgrade to AndroidX, upgrade libraries
* move to MaterialComponents theme
* make sure the compose button looks good everywhere
* fix tollbar title/button alignment on tablet
* move to new material color theming, consolidate colors and themes
* fix build, fix imports
* set error on TextInputLayout instead of EditText
* fix imports, TootButton when
* improve snackbar style
* fix task description color
