big fixens for optionsdialog layout, add OK/cancel buttons as well
ok/cancel accepts and rejects settings now, using the signal

and forwards most of it to the backend
textbox! (well, qml calls it a TextField)

looks good, even brightens up (switches to a brighter png) upon hover.

remove useless gui.xcf (old librocket leftover, unused)

I'll have to start stripping out all of this librocket mess, so cluttered.