Add option which shows 2 whitespaces between key and icon

[CarterLi]

Discussed in #2000

^{Originally posted by VPraharsha03 October 11, 2025}
i'm unable to see space between icon and string when display > key > type is set to "both"

i'm using default font on ghostty terminal, i've tried JetBrainsMono but i see same problem

i'm on 2.47.0 (x86_64)