Dark Mode too low contrast

[Hubtrick-Git]

A user complained about the low contrast of e.g. the open/close button. It was not really visible in contrast to the background. Other UI components are way more visible in comparison.

[5byuri]

sending a version with increased contrast

[5byuri]

[5byuri]

tab is now using bg-secondary

[5byuri]

@Hubtrick-Git lmk what you think of this

[5byuri]

l3montree-dev/devguard-web#762

[Hubtrick-Git]

@Hubtrick-Git lmk what you think of this

looks definitely better than before but I think the real problem just stems from the grey on grey foreground/background. But I think still will do the trick for now.

[seb-kw]

Seems done