Mega Man 2: Technical optimization

This is a Japanese version of Rockman 2 hack, you need to import the IPS patch into the original Rockman 2, not Mega Man 2! This hack adds the following mechanisms:
- Deleted the OP.
- Transparent weapon menu.
- Added EXIT, press Select+Start at the same time to take effect.
- Switch Weapons - See https://www.romhacking.net/hacks/6780/

1.1 update:
- Fixed graphics issues doing EXIT

1.2 update:
- Fixed a bug where switching weapons in the menu always switched to Rock Buster or Time stopper

Database match: Rockman 2 - Dr. Wily no Nazo (Japan)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 108118F41E4CD9E375249D3A3B37A7360024FE64
File CRC32: C722D58D
ROM SHA-1: 3E9DC769E1B63E73834786EC7FE9EDE7E706C72F
ROM CRC32: 6150517C