FLUID-5161: renamed ant build task

Renamed the ant build task for generating the style sheets needed for the preferences framework.
FLUID-5161: modified generated styles.

Changed the style prefix from using uio to prefsEditor also changed the files suffix to be -prefsEditor.css
FLUID-5161: fixed contrast panel.

It appears that the dynamic flag on the style invoker for the contrast panel was lost in a merge. Adding it back has fixed the contrast panel.
FLUID-5161: Renaming "uiOptions" to "prefsEditor", "UI Options" to "Preferences Editor" and "initSeparatedPanel" to "initPrefsEditor".
Merge remote-tracking branch 'justin/FLUID-5161' into FLUID-5161

Conflicts:
	build-scripts/build.xml