make default page size locale-dependent
Default page size in MuseScore for scores newly created from scratch is always A4 unless you change it in the Preferences. It would be nice if installation could somehow detect the locale setting and change this to Letter for countries in which that is more common. Unfortunately, it's not as simple as switching based on language. See this thread:
Some OS's have a concept of locale that is separate form language, and it used to set defaults for units of measurement (eg, inches versus cm),display of date (eg, "Month Day, Year" versus "Day Month, Year"). et al. I don't know how universal that is across OS's or how easy it is to access it or act based on it during installation, but ideally, this is how it should be done, I think.