Viewport wobble on published forms

[DrDBanner]

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Describe the bug
Annoying little overflow gap on mobile view. Can't find the corresponding file. Video attached. PS: On mobile device it's a pia imho. Fix in video.

Bildschirmaufnahme.2025-07-09.um.15.18.06_720p_15F_noaudio.mp4

To Reproduce
Steps to reproduce the behavior:

1. Create form
2. Publish
3. Make window small or open on mobile device
4. See problem; Form wobbles some px left and right.

Expected behavior
No wobble

Screenshots
Attached

Nextcloud (please complete the following information):

• Nextcloud-Version: 31.0.7 RC1
• Forms-Version: 5.1.2

Desktop (please complete the following information):

• OS: MacOS
• Browser Safari
• Version 18.5 (20621.2.5.11.8)

Smartphone (please complete the following information):

• Device: iphone 11Pro
• OS: Latest
• Browser Safari

[DrDBanner]

The main issue is how the <header> is built. The solution provided is the lazy fox, but works with no downside.