Added dynamic cover config options.
add extra check to json response & extra replacement to subject string
Updated translations.
Clarified text.
Merge branch 'release-2.3'
Removed SCSS and updated vendor dependecies.
Translation progress, courtesy of Hugo Agud.
Merge branch 'release-2.3'
LESS inclusion fix.
Merge branch 'release-2.3' of https://github.com/vufind-org/vufind into release-2.3
Removed unused variable.
Merge branch 'release-2.3'
Fixed advanced search slider madness and fixed a div broken between templates.
Merge branch 'release-2.3' of https://github.com/vufind-org/vufind into release-2.3
Merge branch 'release-2.3'
Translation tweak courtesy of Ere Maijala.
Merge branch 'release-2.3'
Italian translation fix

Fix trasnlation for component/host parts notes.
Merge branch 'release-2.3'
Populate lang attribute.