Fixes #4737, allowing the captain to open his office door from the comfort of his chair.

Makes the door control in the captain's office look for tagged doors instead of shutters.
Adjusts the pixel shift of the door control so the captain doesn't have to lean over his own desk to push it.
Makes the button require captain's access to use.
Merge pull request #5528 from PsiOmegaDelta/LazyCaptain

Fixes #4737 - Door control in captain's office now works