Refactor modal region for better readability.
Allow signup form to be triggered using the global event bus.
Make sure the participate modal is re-instantated each time it is displayed to prevent problems with event handling.
Adjust icon sizing to better fit the font size.
Add additional styling for the header.
Change Text for contact link to "Kontakt/Feedback".
Change wording for "Depot" for more consistency.
Minor styling adjustments for `participate` panel.
Merge branch 'refs/heads/feature/participate-content-189' into prototype