Snes9x v1.60

Fixed subscreen blending with master brightness inferior at 100%.
Fixed NMI timing when toggling enable bit. Fixes Chou Aniki?hack removed.
Reverted an IPL map optimization that misses a weird edge case that caused
　The Great Battle III to lock up.
　Clamp MSU1 addition to max amplitude instead of wrapping. Proper MSU1 tracks
will not be affected by this.
Save mipmap_input parameter with customized GLSL and slang shaders.
Actually use mipmap_input parameter.
Optimized subscreen math with help from Dwedit.
Revert to measured APU clock speed instead of nominal speed. Fixes An
American Tail.
Fixed broken BPS patch support. (ArtiiP)
Fixed MSU1 track restarting on load state.

Win32:
Changed window flags to allow NVIDIA cards to auto-enable exclusive
fullscreen mode in OpenGL.
Added a hidden option ≪ DWMSync ≫ that allows OpenGL to sync to the window
manager while in windowed or borderless windowed mode.
The automatic frame skip option no longer limits to 59.94Hz.
Fixed bad icon scaling.
Added a hacks dialog to enable settings for older hacks to run.