v5.1.0 - 20220626

• Reset settings if an older config file is found
  Preferences XML file will be reset if it is older than 5.1.0, in order to
  start clean and avoid possible conflicts.
• Korean language update, minor cleanup. [DDinghoya]
• Remove unused logger.cpp and logger.h. [bladeoner]
• Fix the logic for the Display Virtual Memory toggle. [InfiniteBlueGX]
• Cleanups backported from the Libretro cores.
• dsp: Fix assignment of Op11Xr. [jonathan-teh]
• apu/dsp: Mark function-scope const arrays as static. [jSTE0]
• Fix some memory leaks. [jdgleaver]
• Remove OpenGL options. Not needed here.
• Remap Turbo Mode and add a submenu. (thanks InfiniteBlueGX!)
• Fix an edge case where Turbo Mode could be activated on Dpad Up/Left
  when Nunchuk's Z/C button is mapped. [InfiniteBlueGX]
• Some renaming for TurboMode. [InfiniteBlueGX]
• Add an enumeration for the remappable buttons
  for Turbo Mode. [InfiniteBlueGX]
• SuperFX OC value will properly load on next boot. [InfiniteBlueGX]
• Fix some formatting. [InfiniteBlueGX]
• Add a toggle to hide/show the SRAM save button
  in the save menu UI. [InfiniteBlueGX]
• Remove an unused variable? [InfiniteBlueGX]
• New audio filters (CUBIC/SINC) taken from Snes9x 1.61.
• Invert L/R audio channels, save more settings. [Tanooki16]
  You can now swap Left and Right audio channels with a toggle.
• New speeds for Super FX overclocking, Wii U recommended.
  Added 80 MHz / 100 MHz / 120 MHz. These will stay hidden on the
  Gamecube port's GUI, as the CPU is not powerful enough.
• SNES Hi-Res Mode ON/OFF and Sprite Limit ON/OFF (thanks Tanooki16!)
• Important readme updates.
• Updates for the Spanish language.
• Other tweaks.