VideoConfig: Give VR mode it's own "Video_Hacks_VR" and "Video_Settings_VR" section for settings that will differ between VR and non-VR games.
This was causing many issues in VR mode.  For instance, Mario Kart Wii automatically enabled EFBEmulateFormatChanges which breaks stereoscopic rendering of the EFB.  Metroid automatically loads "SafeTexutreCacheColorSamples = 512" which causes severe stutter with the culling codes.  Now VR games can be assigned their own settings that makes sense for VR.
To Do: Should more of these settings get their own VR copies?  Should "Crop", "AspectRatio", "wideScreenHack", etc never get loaded if g_has_hmd?