PostgreSQL - serial pseudotype support

[vaclavn]

SERIAL pseudotype is useful for quite every creation of table. It will be nice if Adminer will have support for it.

[vrana]

serial and bigserial are automatically created by checking the auto_increment radio.

[vaclavn]

Ok :)

[yus-ham]

serial and bigserial are automatically created by checking the auto_increment radio.

Actually not affected by altering existing column