Fix opening playlist files, plus refactor
Handle opening files through ElisaApplication::openFiles only, which handles audio files and playlist files.
In the process, a lot of newly-unnecessary or duplicated code was removed.
cc @ngraham
Handle opening files through ElisaApplication::openFiles only, which handles audio files and playlist files.
In the process, a lot of newly-unnecessary or duplicated code was removed.
cc @ngraham