Mount the titlebar search in the center area and tune its sizing/spacing; use regular weight for the keybind pill text.
Co-authored-by: Github Action <action@github.com> Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com> Co-authored-by: aaroniker <4730431+aaroniker@users.noreply.github.com>