* Disable / enable header buttons according to min / max
* Add tests for header button states
* Improve header button rendering and refreshing
* Improve header button label escaping on create
* Create button pane for multiple pickers (bugfix)
- Fix merge conflict in value method
- Fix common unit tests
- Fix calendar localization tests
- Fix rebase regression: labels update on refresh
- Add new pass through options
- lint fixes
Add calendar widget by copying and renaming datepicker widget files.
Remove datepicker functionality, options and methods from Calendar.
Remove calendar functionality, options and methods from Datepicker.
Adjust tests due to split and changed specification. Remove duplicated
demo files and fix some demos. Simplify calendar generation, use CSS
instead of inline styles. Fix destroy method. Make use of uniqueId
method. Fix focus highlighting when month is changed. Add version
property. Add common unit tests. Fix input keyboard handling.