- updated libchdr - support for zstd compression
- add Ardens as a valid core with Arduboy FX support
- don't unpause emulator when resetting
- updated memory map support for SA-1/BW-RAM (SNES)
- updated memory map support for WORD RAM (Sega CD)
- fix inability to load extended states created in previous session
- fix inability to hide overlay if no game loaded