RichText: fixed the bug where Underlined text didn't work.
RichText: fixed the bug where Underlined text didn't work.

A simple spelling mistake!

wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI,wkitty42/fpGUI