* for details see issue/18965

co-authored by: Dorian Merz <merz@ub.uni-leipzig.de>

Aspectis authored 4 years ago and Dorian Merz committed 3 years ago

* Fix filter function
* Fix title when list is cached
* Clear filter when escape is pressed
* Improve styling
* Improve accessibility

* remove sub-collections for BASE
* alternative styling of AMSL resources list
* add empty source descriptions for English language
* some restyling and scss refactoring
** re-use filters_title style as used in FAQs
** add more bottom padding
** simplify scss
** make link text more specific
** remove magnifier icon
** draw vertical line further