[BUG] Button "?" for NOT NULL should be Nullable when actived

[d3cryptofc]

I'm using drawsql.app, but I found a inconsistency in the buttons that make a column nullable or not.

It is a button with a question mark "?", and what we can deduce is that if it is activated it means that the field is nullable, but this is not the case, activating means not nullable.