Story PolyCount in the Patch

[baconpaul]

We should just do this, especially with twist requiring careful polycount to be CPU reasonable. So here's the plan

1. Add a workflow switch "Use PolyCount from Patch" which defaults to True and associated menu
2. Make SurgePatch stream it. Easy
3. When SurgePatch unstreams it have the following semantic
   • Record the polycount going in
   • If the version is <= 15, at the end of the unstream, set the polycount to the prior version. (So if you set it to 6 then load a '15' patch it stays 6)
   • If the version is >= 16
     • If the patch has pollycount streamed (which it will for many but not the last month of nightlies) and the pref is set use it
     • If the patch doesn't have polycount streamed or if the pref is set false, use the prior version
4. Close this and Store polyphony limit in patch #429 since this is a dup