Calendar

- The sidebar has been improved, due to the fact that on the left there is no section with archives and friends, which have been moved to more correct places.

- Due to the fact that the sidebar is reduced, more space has been won, the cards have become larger.

- Friends moved to navigation where they can be edited, searched, added, etc.

- Added the ability to display cards by day, week and month

- Each task has its own color added

- Search exists

- The card shared from the inside

- Added mini calendar for even easier navigation