VST: Fix save / load of plugin state. More interface options.

Fixed an incorrect call when setting the chunks on plugins.

Added the ability to to enable having a plugin auto open when active.

plugins/obs-vst

@@ -1 +1 @@
-Subproject commit 62bf634c1ff2ff47280207bd4af253b2142af427
+Subproject commit c60ace19b102c81eae2b784bbc5b912fdda663c3