#386

... instead if setting the value directly on the object. This way 
elements can react to ID changes. This is necessary for DropLists since 
a changed ID has to be reflected to child elements.

#445

Less unneeded scrollbars and fixed height.

Th actual clickable area is displaced by that, which is hard to fix. So 
the worse layout is accepted for now.

The wasted vertical margins did look bad.

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.

- Remove global dialog style

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

#455

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.

Measure holds the value and a unit for CSS properties.