Support for getting title from media file name

[andy-maier]

The sync_title fixup currently gets the title only from the metadata within the media file.

If a media file does not have a title set in the metadata, it is particularly important to do this right, because PMS uses the file base name and folds in things it should not (for example, words after the last "-").

Support should be added to get the title by transforming the media file name, if not set in the metadata. The transformation should remove things that are part of the way PMS wants the file to be stored, consider additional local conventions, and re-establish non-ASCII characters. That all needs to be configurable.