basegrid: removed hard-coded control frame size values.
basegrid: removed hard-coded control frame size values.

The grid used to use hard-code control frame sizes. Now it queries the
current theme, and uses those returned values accordingly.

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