Support non-pfat0 savestates, slightly hacky...
Warning fix.
Shutdown issues: the legend continues.

If the gpu was slow (softgpu for example), it might still be accessing
memory.  Need to let it wake, and ignoring coreState too.
Merge pull request #4161 from unknownbrackets/savestates

Fix savestates, one more shutdown glitch
Make Fullscreen checkbox instant.