Bugfix: reload tag does not update bitrate/filesize

When reloading tag, the display information window does not reflect the new bitrate settings nor new filesize.  Sometimes I update my library replacing low-bitrate tracks with higher bitrate.

Ofcourse, I could remove it from the collection and re-add it, but then my beatgrid is also reset. For some tracks, there's too much work in that for just loosing the beatgrid.

Thanks for a fix :-)