Patch to maintain "Automatic alias" checkbox state and collapse "URL path settings" when appropriate

This patch against 6.x-1x-dev maintains the state of the "Automatic alias" checkbox for each node and, if checked, collapses the "URL path settings" fieldset by default. It only remembers the state after a node is saved, so it will have no effect on existing nodes without updating each one.

I ported this over from a helper module I had created to manage these wee quirks for me, so apologies if the integration is a little clumsy.