Removed non-word character from quality label to ensure right quality guessing after renaming

If you had the quality tag in the rename string a movie got renamed for example "Movie.Name.BR-Rip.avi".
During quality guessing this filename got split up into "movie, name, br, rip, avi" and therefore no identifier string could be found in the file name. This then led to loose guessing using metadata, which mostly ended up in a DVD-Rip quality because of the resolution.

In the library, this issue caused a BR-Rip status marked as 'downloaded' and in parallel a DVD-Rip status marked as 'done'.

Having the non-word character "-" removed from the quality labels the movies get renamed into "Movie.Name.BRRip.avi" such that the quality identifier "brrip" can be found in the file name.