Draft: Round some Kirigami.Icon instances to defined icon sizes again
With Kirigami.Icon, we have to do this ourselves in places where the icon otherwise fills a parent that can smoothly resize but we want it to snap to defined icon sizes rather than resizing smoothly itself.
Mostly straightforward, but the Icon applet needed a bit of re-plumbing. WIP because this is still not working quite right; will fix it soon.
Edited by Nate Graham