Summary

• Fix various mistakes in translations
• Fix mismatched whitespace and punctuation in translations
• Proper punctuation for French, Russian and Ukrainian
• Remove some unused strings
• Decapitalize "CODEC" in Aztech sound card configuration
• Fix an incorrect error message in qt_openglrenderer.cpp
• Move the trailing space in the "Disk %1: " string out of translations
• Use QString::arg() instead of concatenation for the monitor number in the title bar
• Use EMU_NAME instead of "86Box" in the about dialog

Drive-by: Properly separate Qt and SDL UI codepaths in update_mouse_msg(), which allows to drop the related hack for non-Windows platforms in qt_mainwindow.cpp.

Checklist

• Closes #xxx
• I have tested my changes locally and validated that the functionality works as intended
• I have discussed this with core contributors already
• This pull request requires changes to the ROM set
  • I have opened a roms pull request - https://github.com/86Box/roms/pull/changeme/

References

N/A