Rebranding: Headline color highlight & text wrap

[dmitrijkiltau]

It should be possible to highlight parts of a headline, as it is supposed to in many components:

It should be possible by either

1. using another WYSIWYG option, like <strong> and changing the css of it,
2. or by introducing a new dropdown in the inline WYSIWYG editor to select the text-color.

We should also use the tailwind classes for the css text-wrap features "balance" and "pretty". For headlines we should use "balance" for normal text "pretty": https://developer.mozilla.org/en-US/docs/Web/CSS/text-wrap#result