Add ability to use Save As... for entire score while in a part.
File -> Save As has always meant, in just about every program in existence that supports files, "Save the current file as a different file ".
The behavior in MuseScore appears to be context sensitive to whether the Score is the currently selected part.
If the currently selected part is the score, then the behavior is the same as every other program in existence.
If the currently selected part is a part, then it functions as: "Save the currently viewed part as another file".
In general, actions underneath the File menu typically pertain to the entire file and are not context-sensitive on any kind of selection made.
I am involved in a project where I share lots of MSCZ files with my peers, and it happens quite often that someone accidentally saves out a Part rather than a Score. Based on the discussion here https://musescore.org/en/node/299764, I'm sure that many have made similar mistakes.
The desired behavior for Save As is: "Save the current file as a different file".