fix: removed wrong color on active actions button

[emoral435]

☑️ Resolves #2138

🖼️ Screenshots

^This would previously caused the button to have the correct background-color!

🚧 Summary
When the button was focused, this caused the NcButton to have these styles applied : https://github.com/nextcloud-libraries/nextcloud-vue/blob/c39a05682403a19d5ba6e8699ca496e28daa4232/src/components/NcActions/NcActions.vue#L1669

Arguably, you could say that I should edit the components styles here - however, they where added for a reason, and changing that styling could cause regressions all around the server, so its best to change it personally within the viewers view!

Checklist

Code is properly formatted

Sign-off message is added to all commits

[ ] Tests (unit, integration, api and/or acceptance) are included

[x] Screenshots before/after for front-end changes

[x] Documentation (manuals or wiki) has been updated or is not required

[x] Backports requested where applicable (ex: critical bugfixes)

[emoral435]

/backport to stable28

[emoral435]

/compile amend/

[emoral435]

Moved the changed CSS to another appropriate place that lets it not display the outline 👍

[Pytal]

Thanks @emoral435! Force-pushed a small adjustment to remove !important so the hover/focus styles apply correctly

[Pytal]

/compile amend /

[emoral435]

Thank you @Pytal :)

[JuliaKirschenheuter]

/backport f75d877 to stable28

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