[PATCHES] PgAccess schema-diagram cleanup

Here's a patch to clean up some issues with the schema diagram
editor in pgaccess. This patch:

* allows schema window to be resized up to full screen size
* autosizes window on schema open
* allows multiselect of tables (by shift click) to allow
dragging of sets of tables
deletion of sets of tables
* fixes a bug in table deletion code that did not delete
links to that table properly
* changes link lines to be continous, so they export better
via postscript->pstoedit->xfig

It does not change the name of the feature from schema, as I
asked about on HACKERS. I'm off for a week's vacation starting
tomorrow, so I probably won't see any commentary on this until
Monday the 24th

Ross
--
Ross J. Reedstrom, Ph.D., <reedstrm(at)rice(dot)edu>
NSBRI Research Scientist/Programmer
Computer and Information Technology Institute
Rice University, 6100 S. Main St., Houston, TX 77005