[BasicMenu]
Add tests?

[ButtonMenu]
DONE - Emit the button click signal to the parent?

[CalendarMenu]
The Calendar components needs to support multiple models
DONE - expose some properties
DONE - Add tests
- Do not repopulate the whole model on property changes, be smarter

[EventMenu]
Date of the Event should be formatted
DONE - Add tests

[MediaPlayerMenu]
DONE - Right signals for skipping songs, maybe extra properties exposed

[ProgressBarMenu]
DONE - The ProgressBar does nothing, needs API

[SliderMenu]
DONE - The Slider does nothing, needs API

[TimeZoneMenu]
Needs to format and support real timezones
DONE - Add tests

[UserSessionMenu]
DONE - Add tests
