Click rework and a few fixes

Currently our click's behavior is inconsistent, you can switch from the number picker to the earmark picker but not the other way around and the number picker refreshes on each click. The picker is also awkward to clear, requiring a click on fixed cells or an escape press, which at times makes it hard to view the board.
The rework streamlines the click's behavior and gives it a toggle-like behavior.

Added the possibility to clear earmarks from the number picker.