Removed unused Tracer.h/cpp
Removed Tracer.h/cpp from VS files
Fix regression with toggling the toolbar from PR761
Merge pull request #784 from archshift/rem-tracer

Removed unused Tracer.h/cpp
Merge pull request #786 from shuffle2/fix-toolbar-toggle

Fix regression with toggling the toolbar from PR761
Rewrite raw memcard threading code. Intended to fix issue 7484.
Change GC memory card emulation such that the device emulation doesn't know about flushing data to whatever backing storage is used. Raw memcards now will flush every 15 seconds if they're dirty, with a final flush when the object is deleted. For GCI folder, it is only flushed when the object is deleted.