Make link buttons look more like links

Merged Nate Graham requested to merge ngraham/kirigami:linkier-link into master

Not having an underline when unhovered makes these links look less link-like than is ideal, and also makes these links inconsistent with the links in text labels, which always have an underline.

BUG: 459227 FIXED-IN: 5.99

Before After
Before After

@teams/usability @teams/vdg @justinzobel @mart

Merge request reports