DDBNEXT-820: layout restructured
DDBNEXT-820: compare page js
DDBNEXT-820: compare js working progress
DDBNEXT-820: prototype of the compare page finished
Merge branch 'DDBNEXT-820_divs_refinements' into develop
Merge branch 'develop' of https://github.com/Deutsche-Digitale-Bibliothek/ddb-next.git into develop