Revert "Disable auto-load for comboboxes. "
Revert "Disable auto-load for comboboxes. "

This reverts commit a255dcd6622b7dee6036b51acb67fe979adfcec2.
lsaffre/lino_extjs6,lino-framework/extjs6,lino-framework/extjs6,lsaffre/lino_extjs6,lsaffre/lino_extjs6,lsaffre/lino_extjs6,lsaffre/lino_extjs6,lino-framework/extjs6