Sort operator version popUp list in WiringEditor

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Fix bug when WiringEditor have Ghost operators without any other version for this operator

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Add preventDefaultListener method in Wireloud.Utils

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>
Improve minioperator version icon behavior.