v1.8.4

Changelog:

• Update SHAKE opcode details (thanks to dangarfield)
• Fix door update bug
• Fix crashes on adding/removing fields
• Permit to open an invalid ISO file
• Fix crash when adding a new walkmesh triangle, if the triangle list is empty
• Fix remembering expanded items
• Removing auto-scroll when editing an opcode
• Change Ctrl+Q shortcut to Ctrl+K (music/tuto menu). Command+Q is a reserved shortcut on Mac OSX
• Fix crash when entering walkmesh with OpenGL disabled
• Fix text autosize for VARDEC/VARDECR/VARHEX and MEMORY commands
• Fix DAT file import