[UI] Fixed issue with games list UI crashing on close on Vulkan

[HID] Added support for Xbox 360 Skylanders Portal

• This requires Zadig for installation of WinUSB driver for portal

[HID/SDL] Return controller subtype instead of forcing gamepad

[XAM] Settings: Added specific default settings list

[XAM] Implemented XamParseGamerTileKey

[XAM] Added missing is_empty check while reading setting data

[Kernel] Adjusted threshold of delay triggering for threads from all with Normal priority to Below Normal.

This should resolve slowdowns introduced in one of the latests build

[XAM] UserTracker: Added option to return user specific list of contexts and properties

[XAM/NUI] - Implement More Functions

• Implement XamNuiIsDeviceReady, XamNuiIdentityGetSessionId, XamNuiHudGetInitializeFlags, XamIsNuiUIActive, XamUserNuiGetUserIndexForSignin and XamNuiHudGetVersions
• Stub XamIsNuiAutomationEnabled/XamIsNatalPlaybackEnabled, XamUserNuiGetUserIndex, XamUserNuiEnableBiometric, XamNuiGetDepthCalibration, XamNuiSkeletonGetBestSkeletonIndex, XamNuiIsChatMicEnabled, XamNuiPlayerEngagementUpdate, XamNuiCameraTiltGetStatus, XamNuiCameraElevationGetAngle, XamNuiCameraGetTiltControllerType, XamNuiCameraSetFlags, XamShowNuiGuideUI, XamNuiHudIsEnabled, XamNuiIdentityEnrollForSignIn , XamNuiIdentityAbort and XamNuiHudSetEngagedTrackingID
• According to Xam XamIsNuiAutomationEnabled, and XamIsNatalPlaybackEnabled are the same function.
• Left Notes for future reference