How can I vertically align text in “input key selector”? And is there a way to make unfocusable like buttons? I can’t find the same option
Doesn’t look like there’s any way to do so. This widget seems particularly unfinished!
Still no way to do this 
Epic needs to overhaul this widget.
Maybe createing your own label and setting the text accordingly could be the only workaround but then you need to replicate the hint text and all.
I simply just accepted using it narrow in height by setting the vertical alignment to center.