Show reset to default button for theming values on hover

[claell]

When in the Theming section of administration there are "restore to default" options offered when changing the logo or Login image. When changing other theming settings this is not offered.

At least for the color it would make sense to also offer a reset button.

[schiessle]

You need to click into the input field to see the undo buttons inline (only if the input field doesn't contain the default value).

cc @nextcloud/designers I think we should show the undo button on hover otherwise it is really hard to discover.

[eppfel]

👍 For onHover.
"Always show reset button" was dismissed before (too lazy to search for the discourse), but I am open to it.
@nextcloud/theming

[MorrisJobke]

too lazy to search for the discourse

#770 and #1049

[claell]

Ah, did not expected it to be in the input field.

From a user perspective I expected a "pattern". All existing reset buttons are placed on the right or on top of the changed element, so I did not search for it in the input field (and maybe it would make sense to have every button at a similar position).

Regardless showing it when hovering over it or always showing it will improve the current situation.

[jancborchardt]

Yeah, also showing the reset function on hover makes a lot of sense. What do you think @juliushaertl?

[juliusknorr]

Yeah, also showing the reset function on hover makes a lot of sense.

👍 from my side

[jancborchardt]

Pull request at #5319, please review :)