[Request] Default values to table

[peterstriz]

Add a simple button when table is empty (only if table is empty, else it will disappear) to add boilerplate: Id (Integer, with PK and Auto Inc.), Created_at (timestamp), Updated_at (timestamp)

[dineug]

Basically, I want to take simple UI configuration.
I don't think we need a repetitive column because it can be copied from another table.

[dineug]

Move table context menu.