Opening the same maze/mazeCollection file 2x

[bakerhillpins]

If you open the same file 2x in the editor when it comes time to save/exit the user could end up overwriting their file because the close Op just asks to write to the file that was the source of the original object. Thus, which ever maze/collection is 2nd will win.

Apps such as VS don't allow you to open a file 2x, If you do it simply directs your cursor to the already opened file with a warning dialog.