- more contrasted primary palette;
- white toolbars for list and detail views;
- modules navigation always visible;
- wrapped detail views into a md-card;
- moved preferences button to the sidenav;
- moved the sidenav toggle button to the top toolbar;
- new "flip" visual effect when looking at the raw source of cards and
messages.
Creating an event or a task using the contextual menu will now consider
the day and hour of the menu position (fixes#2557).
The next/previous day/month menu options have been fixed.
The menu will now disappear when clicking outside the contextual menu on
the calendar area.