widl: Store the pointer description in the type rather than base type so that it gets re-written when the type is re-written.

The iTunes 8 installer database has an integer column of size 1 which
takes up two bytes at storage level, so adjust the column size calculation
to account for this difference.

Also add some comments.

These don't have a whole lot to do with each other.

It's a bit pointless to keep printing FIXMEs after the first time.

user32: When all items in a menu have either a bitmap or text but not both, then texts should be aligned with the bitmaps.