STUDIO-2539 Improve legibility of the connector list. 
Add selector componenent but not working well (can not click "next"
button) and not clean
STUDIO-2539 Integration works but still a bug with connector output
Moreover ugly layout when no pre-check "custom definition only" checkbox
STUDIO-2539 Correct layout + fix a small bug but wizards still
unfinishable
STUDIO-2539 Correct binding fix unfinishable wizard
Merge branch 'STUDIO-2539' into CoreProduct

Conflicts:
	bundles/plugins/org.bonitasoft.studio.connectors/src/org/bonitasoft/studio/connectors/ui/wizard/ConnectorImplementationWizard.java