Enum / Enumlist - base type - Ref to immidiately show the reference table without sync

This could be more bug fix request rather than feature request.

When we select enum or enumlist, then we have option to set the base type ref and then esablish the relationship with other table, by picking up the reference table.
The dropdown list for selecting the target tables is only becoming available once we save the editor. Wish to change it to make the list available WITHOUT sync.

An oldie, but a goodie!