refs #22869 [finc] use always mobile variant for hiding applied filters by default

* saves space
* consistent behavior
* dropping html (former desktop view)
* change order of show-all-filter-toggler and reset-all-filters-button by change floating scss variables
* add variables for floating-settings of reset-all-filters-button and show-all-filterd-toggler
** order can be changed in instances
* show-all-filterd-toggler more accessible (tabbing) than before
* read .collapsed class on show-all-filter-toggler
* accidently deleted before
* unify active filter container and advanced search information container (terms + links)
* introduce new finc variables for container boxes
* active filter container & and advanced search information container inherits from finc
* can be overridden in instances
* highly customizable
** padding, border & background
* if there are more than 3 selected filters of the same filter group they will be shown in a dropdown
* back to vufind standard
* now enough space for many filters

co-authored by: Claas Kazzer <kazzer@uni-leipzig.de>
* reset filters
* adds background to filters block + variables
* active filters final touches
* adjusts design to adv search terms