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