VR Mod App v0.9.2

• added support for assigning single keys in vrperfkit hotkeys (note that the mod currrently seems to only support assignment of F1..12 keys)
• implemented set mod source data dir for every mod type
• add vrperfkit install to FrontEnd table filter
• debounce caching when selecting install paths
• cache vrperfkit mod settings for non-openvr apps
• selecting multiple executables in the same directory will no longer result in an error message when uninstalling