Datepicker and day slides functionality.
DatesController cleanup and renaming.
Fixed swiping focus tasks slides showed 'no date' tasks in all slides.
'no date' is indicated with null instead of undefined not to conflict with slides whose infos is cleared.
Added function to get week number for a given date.
Started implementing datepicker heading.
Default toolbar is hidden if custom toolbar is registered. Initial implementation was to hide the toolbar and create datepicker heading deeper in DOM, but toolbar dimensions must be preserved to prevent swipers from resizing and breaking the layout.
Active day, month and year indicators in datepicker.
Renamed .large to .height-large.
Increase primary heading text width.
Smaller font on custom toolbar.
Make sure container is not removed same time as looping containers in editable field backdrop click elsewhere.
Datepicker:
 * Replaced toggle datepicker with open|close datepicker to make it work with click elsewhere.
 * Show weekdays in datepicker.
 * Use ng-if to show custom toolbar instead of ng-show

Other:
 * Added getShorWeekdayNames function.
 * .text-details if downplayed by default