Search engine: Highlighting toogle button: label and behaviour
1/ The label in German should be corrected as follow: Hervorhebung umschalten => Hervorhebung aufheben
2/ The label in French should be corrected as follow: changer le marquage => Surlignage du texte (with capital letter at "Surlignage)
3/ When switching to full screen, the brush symbol becomes a second full screen symbol
4/the tooltips overlap (full screen tooltip and hihlighinth "brush" tooltip)