Specify ENUM values

[matheusvellone]

It would be helpful to provide users some input to add valid values for an ENUM field, while also displaying the values in some way (maybe on hover)

[PillFall]

This could be possible, but I believe it could be harmful for the table editor to change those properties.

I believe this could be done by adding a click event to the ENUM keys for editing the columns, that way it doesn't interfere with the editor UI