MAME Plus! 0.128u6 released

- [QtGUI] improved performance of loading icons [Emuman]
- [QtGUI] all components are now toggleable in the “View” menu [Emuman]
- [QtGUI] fixed M1 bug in b4 [Emuman]
- treat ips errors as warnings [Emuman]
- [MESS] sync with svn r3858 [Sword]
- fixed fr2ch driver [Creamymami]
- updated Japanese list (jplist0128u5_1215) [mamelist jp]
- updated Simplified Chinese list (0128u6_1215) [kof2112]
- [MAME] sync with 0.128u6 [Sword]