Emulation fixes: - GB: Fix savedata initialization - GB: Fix SGB controller incrementing - GB Audio: Improve channel 4 supersampling - GB Printer: Reset printer buffer index after printing - GB Audio: Deschedule channel 3 when disabled - GB Audio: Deschedule channel 1 when disabled by sweep - GB Video: Increment BCPS/OCPS even in mode 3 - GBA Memory: Fix STM to VRAM - GBA Memory: Fix STM/LDM to invalid VRAM - GBA Video: Fix wrapped sprite mosaic clamping - GBA Audio: Fix channel 4 aliasing Other fixes: - Core: Fix crashes if core directories aren’t set - Core: Fix crash when exiting game with cheats loaded - GBA: Set up GPIO mapping on null and ELF ROM regions - GBA Cheats: Fix PARv3 Thumb hooks - GBA Cheats: Fix value incrementing in CB slide codes - Qt: Fix FPS target maxing out at 59.727 - Qt: Cap audio buffer size to 8192 - Qt: Fix race conditions initializing GDB stub - Qt: Improve cheat view UX - Libretro: Fix crash changing allowing opposing directions - mGUI: Fix crash if last loaded ROM directory disappears - Switch: Fix threading-related crash on second launch Misc: - Qt: Make mute menu option also toggle fast-forward mute - Qt: Show error message if file failed to load