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.

... to create a new reference for options property.

Measure holds the value and a unit for CSS properties.

This is not put under version control.

Update/angular 14

Refactor/remove flex layout editor

- Reformat styles

- Reformat styles

- Reformat styles