Several elements were broken after updating the Material library.

Add new component for combobuttons, which allow selecting and applying a 
value in one connected element.

Most importantly remove the standalone switch and let the service always 
send postMessage, even when there is no surrounding application 
listening. This helps testability and has no downsides.

Also:
- Make methods static where applicable
- Remove useless variables and methods
- Improve variable initialisation (to allow undefined)

- Remove global dialog style

- This allows to assign a font to a text in MatFabButtons

causes problems after update

New character: protected dash (which does not break lines)

#455

#452

Element margins and grid sizes now have a measure unit attached. The 
translation logic to merge unit and value are done via Pipe.

flex-start is the correct value for flex containers.

This makes sure the elements are in the correct order within the 
section's element list and therefore in the DOM as well, when displayed.

Sanitization is now done within classes. Keep the Service in the code 
for now.