Some code is already shared between gtSetup and guiGtSetup, and this will be extended as the functionality of guiGtSetup is extended

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@144 4c865b51-4357-4376-afb4-474e03ccb993