Replaced latest bumbls with most bumbld songs

It makes more sense to display the most bumbld songs sorted by number of
bumbls and then by upload date, instead of displaying latest bumbls.
latest bumbls says nothing. But most bumbld song means that the song is
popular.
Furthermore there was a strange bug occuring random. Displayed random
shit and weird sorting of latest bumbls. The sorting changed by
navigating to another site. So I experimented and after some time I
thought that it might be more useful to display most bumbld songs.