Redesign on state in menu and dropdowns

[Mati365]

📝 Provide a description of the new feature

During the development of accessibility (A11y) improvements for menubar and other dropdowns, there was a discussion about how to represent the "on" state in these controls. Currently, the "on" state is not visually represented in the menubar, but in dropdowns, it appears as a "filled-in" blue state[1]. However, this doesn't look great in the menu. As a solution, the team decided to use checkbox marks[2] to indicate whether an option is selected or not.

[1] Old filled in state:

[1] New checkbox menu state:

[Mati365]

@scofalik / @DawidKossowski Follow-ups:

1. Get rid of isToggleable flag from ButtonView. #16611
2. Focus dropdown items while hovering them and show focus after first keyboard interaction. #16612
3. Unify dropdown menu items checked state styling and focus behavior with menubar  #16613