This comes out from me pointing out the obvious aspect in this discussion:
I see no reason whey the users should be allowed to edit
_FILENAME in the Tag Panel.
_FILENAME_EXT- now that would be a different story, because changing file formats in Mp3tag would mess up the usage of the files. But a mere
_FILENAME? All bad that can happen is this: the user gets the pop up windows informing that for example
File "C:\Music\Hans Zimmer\Inception Opening Titles.mp3" cannot be renamed to ``File "C:\Music\Hans Zimmer\Opening Titles.mp3".
Cannot create a file when that file already exists.
And such pop ups are already appearing- the mechanism for them is already built in Mp3tag