core-4249 add code mirror lib. for syntax highlighting
refactor text viewer to use CodeMirror
core-4249 refactor code and add nexus syntax
Merge branch 'master' into v1.8.2
Updated to GXT 3.0.6
Removing dependency to GXT 225
CORE-4727: Removed GXT folders from war dir.
CORE-4667, CORE-4716: 
* Moved system message related autobeans to ui-commons
* Moved tool request autobeans to ui-applications
core-4714 fix notification created date sorting issue