fix styling of development-notice

[szaimen]

Close #42642

Before

Aufzeichnung.2024-01-11.114319.mp4

After

Aufzeichnung.2024-01-11.114018.mp4

For my own testing

docker run -it --rm ^
--name nextcloud-easy-test ^
-p 8443:443 ^
--volume="nextcloud_easy_test_npm_cache_volume:/var/www/.npm" ^
-e SERVER_BRANCH=enh/42642/fix-development-notice-styling ^
-e COMPILE_SERVER=1 ^
-e VIEWER_BRANCH=master ^
ghcr.io/szaimen/nextcloud-easy-test:latest

[susnux]

should we fix the icon? Probably missing filter: var(--primary-invert-if-dark) (or similar)

[szaimen]

should we fix the icon? Probably missing filter: var(--primary-invert-if-dark) (or similar)

Í fear this does not work here as the icon is no item but only a css class:

[emoral435]

Looks great!

[szaimen]

/compile

[szaimen]

/backport cf17267 to stable28