Improved overview on software spotlights (gallery, multicolumn...)

• see also comment on this.
• Related !380 (merged) for filtering of spotlights

changed milestone to %Homepage Relaunch 2022 - version for evaluation report hand-in

added Enhancement::UX label

mentioned in merge request !373 (merged)

changed the description

mentioned in issue #198 (closed)

marked this issue as related to #198 (closed)

@lisa.klaffki @SpickerHZB @englae39 propose to put this to "optional" milestone, same as #278 (closed)

marked this issue as related to #278 (closed)

added propose-to-make-optional label

duplicate of #278 (closed)

closed