MFI Controller Fixes

- Added missing shoulder buttons to "Standard" controller type
- Fixed unresponsive left thumbstick on "Extended" controller type (caused by "Standard" controller type sending direction released commands at the same time)
- Pause button brings up SiOS menu
- Select/Start can be triggered by extra Left/Right Trigger buttons on "Extended" controller type (allowing games like Super Metroid to be manageable in combat)
- Select/Start can be triggered by holding Left Shoulder + Pause / Right Shoulder + Pause on "Stanard" controller type (allowing games like Super Metroid to be manageable in combat)