[Suggestion] remove qwindowsvistastyle.dll
maybe it's better to remove the build of qwindowsvistastyle.dll on styles folder... ( this make the windowsvista choice disappear on styles menu )
and also it's possibile to remove the "FIX" for this (old and unnecessary) style...
QStringList incompatibleStyles = {QStringLiteral("GTK+"), QStringLiteral("windowsvista"), QStringLiteral("Windows")};
on mainwindow.cpp
P.S. there is a reason for that style? (is just some sort of legacy?)