If you’re worried because your widget’s colors aren’t changing properly, don’t panic!
There is nothing wrong with your engine installation, or any of its settings.
I’ve discovered that, at least in UE 4.22.2, the color of hovered text is affected by the color of the text itself. If the text block on your ServerRow is blue (as mine is), following the lecture as recorded will turn the text green when hovered (blue text + yellow color produces green highlighting).
Just wanted to let people know, just in case. XD
:Edit: It actually looks pretty nice…