Re-work data entry for enum

[catileptic]

When we create a new table inside Paul, and we add a column and assign it the Enum type, we can't add new entries in that column because the drop-down menu lists no options (as none were introduced).

We need to find a way to define the complete set of possible options for a column that has this type on Table creation

TODO: @overeha, @catileptic create a feature set and design for a search or create ui component

[overeha]

Can this be an input option? @costibleotu