Invisible "Cancel" button

[Valdnet]

Steps to reproduce

1. Launch the app.
2. Go to app settings.
3. Select data locations from general settings.

Expected behaviour

• Visible Cancel button.

Actual behaviour

• Invisible Cancel button.

Environment data

Android version: 10

Nextcloud app version: 3.14.1 and Dev 20201208

Nextcloud server version: 20.0.2

[AndyScherzinger]

true for all other addition selection dialogs within the settings screen (they make use of the fallback theme)