Quote for search/filtering

This PR introduces the well-known detail mode toggle for the search results too. So the quote is now visible (after a toggle) and enables page search for quotes too. The hits in the quotes are highlighted too the same as for text search.

Also it fixes the missing feature of highlighting the annotation's quote when hovering the mouse pointer over an annotation card. 

This is a solution for point 1,4 and 5 for issue #617