I asked how to do this over 10 years ago (ahem) and thankfully the keyboard shortcut even then made it into help.
But because these days I'm an occasional mp3tag user, I still forget it!
But having an option to do this automatically would really help lots of dragging column delimiters around, trying to show on-screen which pesky tag is non-compliant!
And then having to do it all over again with another album ...
(Also the function still ignores (and hence) truncates column headers which then requires more column resizing, so it would be nice to have that fixed too)