Follow-up from "Issue/mark annotations in text panel"

The following discussion from !167 (merged) should be addressed:

• @nwindis commented on a discussion: (+2 comments)

  it's bugging me too, but up to now I didn't wanted to increase the line height. I suggest to accept it as is for now. I wish for a general UI refinement later on. getting everything right now is tricky, because things change a lot and often. consistency is the goal, but the big picture is sort of missing for now.