Icons have become invisible

[greystate]

I've just upgraded a site to Umbraco v7.12.2 and now the icons in the Prefetch ListPicker are missing

Before

After

I tried upgrading nuPickers to the latest version, but that doesn't fix it.

The icons are actually there, but the class names have changed, so instead of just blue (the plus sign) and red (the cross) they seem to now have to be color-blue and color-red.

But that doesn't fix the problem with the height, which I haven't been able to debug...

[greystate]

I've located the culprit w/ regards to the sizing being off — it's the .button class - apparently Umbraco have started using that, so "cascade" etc.

If I rename it to .picker-button (in CSS and views) it gets its old self back.

PR incoming - then we can discuss which name it should get for real :)

[r-Larch]

I've the same bug after upgrading to Umbraco 7.13.2.
I would be thankful if you throw out a release, so I can remove my ugly hack-fix.