[SNES/GB] Bsnes 0.78

Changelog:

• memory and most registers are now randomly initialized on power-up
• fixed auto joypad polling issue in Super Star Wars
• fixed .nec and .rtc file extensions (they were missing the dot) [krom]
• PPU/accuracy now clears overscan region on any frame when it is disabled
• PPU/compatibility no longer auto-blends hires pixels (use NTSC filter for this)
• added hotkey remapping dialog to input settings window
• added a few new hotkeys, including quick-reset
• phoenix API now auto-sizes widgets based on font sizes
• file dialog once again remembers previously selected file when possible
• updated mightymo's cheat code database to April 19th release