ide: huge speed improvement in syntax highlighting
ide: huge speed improvement in syntax highlighting

Getting font resources are very costly. So now we cache the font used
for reserved keyword highlighting and simple reuse it, instead of creating
and freeing it for each line (like we did up 'till now).

This caused a MASSIVE speed increase! :-D

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