Buttons steal focus and retain focus until another element takes it away

[Kapu1178]

This issue has been present for a while, I think since the React change. The issue was covered up by a CSS change done in tgstation/tgstation@e5d9053#diff-67bab2695db349f88853de7a56a71a48ebf6dc3eb99d17b231583be8ebaa6b22

[ZeWaka]

i don't seem to experience these focus issues, though

[Kashargul]

i don't seem to experience these focus issues, though

It's stylewise changed on tgui core to no longer have the button highlighted on focus. The question is more, do we want to introduce a mid way? I'm not sure if it's a good idea or not, to change back to the highlighting on focus again and blur on clicks whilst keeping it on tabs, so that keyboard users keep their last used button highlighted and shown as selected.