#461

#461

#461
- This property will be used for all input assistance presets
  in the future

#397

#456

- Add Property "hasAutoHeight"
- Add Directive AutoHeight

#520

#382

- Use own StateVariableStateService which uses the same new base class
as UnitStateService

#525

#525

#506

#523
- Improve sanitizing of position margins

Make player control bar inherit pointer-event styling. This way the 
Editor can set it to none, while acting normal in the Player.

#524

#522

#452

- Don't report empty reference string as invalid
- Add VideoElements to check

Not just when an older version is detected.