Make WhatsApp helpdesk button more visible

[elwinschmitz]

Add opening-hours/explanation + separate CTA to Feedback-FAB.

Tasks

Beta Give feedback

1. Decide re-use or refactor existing Contact-options (Check real usage)
2. Add new rows for text-labels: "Feedback Title + Explanation"(Markdown?), "Feedback CTA", "Feedback Icon"(URL), "Feedback Target"(URL)
3. Create "pop-up"-component
4. Check/plan refactoring/updating of sheet-data
5. Create implementation/deployment checklist for UM + other instances?