Primarily a maintenance release, bug fixes etc

  • Updated to Qt 6.1
  • Fixed a minor bug that caused garbage icons to be displayed for systems without icons
  • Supporting -attach_window on SDLMAME 0.232 and higher
  • Omitting -attach_window when MAME identified as lacking support
  • Various changes for running under Linux [Davide Cavalca]
  • Small optimizations to the building of MAME Info Database (-listxml handling)