[BITV] Modal next/previous buttons contrast possibly too low

[PVince81]

Steps:

1. Needs https://github.com/nextcloud/nextcloud-vue/pull/2953 (or click https://deploy-preview-2953--nextcloud-vue-components.netlify.app/#/Components/Modal)
2. Open styleguide
3. Scroll down and click on "Show modal with more properties"
4. See the arrow buttons on the left and right of the modal

Now this is with a white background from the styleguide + darkened overlay color.

Whatever the solution is, I'm not sure if it can work with all backgrounds ?

The focus effect looks fine though when tabbing:

[PVince81]

@jancborchardt @nimishavijay

[jancborchardt]

Since the background is always made dark with that overlay, the icons should be white – then it works contrast-wise as well. :)

[PVince81]

@jancborchardt I assume white only when not hovered

[PVince81]

@Pytal can you adjust ? this will is the last item in https://github.com/nextcloud/nextcloud-vue/issues/2501 so we can then close that one too

[Pytal]

Fixed in https://github.com/nextcloud/nextcloud-vue/pull/3080