Unify arrows on collapsible elements / accordions
Description
Minor change on store page and Arbeitsgruppen overview to unify the use of accordion pattern.
Goal
Currently the accordions (brown headings that can be opened / closed) on the dashboard/store/arbeitsgruppen view use different logic this shall be unified to help usability.
Evidence
accordions (brown headings that can be opened / closed) on the dashboard/store/arbeitsgruppen view use different logic
Solution
If no reason exists why another solution is preferred I would suggest that all accordions shall use the logic:
arrow up -> accordion is currently opened
arrow down -> accordion is currently closed
This logic is currently used on the dashboard and shall be applied to store page and arbeitsgruppen view (where brown headers collapse/expand but no arrow is shown).
If any other area on the fs website is know that uses this pattern/behaviour it should also be unified.