- remove 'none'

- to prepare markable support for text as compound children

This fixes Tables which houses elements without dimensions.

#656

The delay is used to check whether a selection is still available after
PointerUp, as this is often deleted in Firefox under Windows mobile

#623

#613

#552

#608

- Prevent input of 'Dead' keys

- Toggling of keyboard and keypad are now async
- Keyboard and keypad animations are disabled for a short period of time

- Input field manipulation moves from service methods to new
  TextInputGroupDirective

- Remove unused imports

#596