Implements showing a list of primay key columns for a selected table to the
user, allowing the user to drop the primary key or view the SQL that will do
this.
Implements showing a list of columns for a selected table to the
user and dropping the ones that are selected when the user presses the
drop column(s) button.
Implements showing a list of columns for a selected table to the
user and dropping the ones that are selected when the user presses the
drop column(s) button.