Popup controls behind header on mobile when expanded

[LorenzBischof]

Describe the bug When I expand the edit popup the controls to close it are hidden behind the header.

To Reproduce Steps to reproduce the behavior:

1. Go to 'https://umap.openstreetmap.fr' (version 3.0.5)
2. Click on 'edit'
3. edit a marker
4. expand the popup

Screenshots

Smartphone (please complete the following information):

• Device: Pixel 6a
• OS: Android
• Browser Vanadium (Chromium)

Also reproducible on an iPad