Soundboard doesn't work for players when file picker is used

[CDeenen]

Replace the playTrack function in MaterialKeys.js with:

export async function playTrack(soundNr,play,repeat,volume){
    if (play){
        const trackId = game.settings.get(moduleName,'soundboardSettings').sounds[soundNr];
        const playlistId = game.settings.get(moduleName,'soundboardSettings').selectedPlaylists[soundNr];
        let src;
        if (playlistId == 'FP'){
            src = game.settings.get(moduleName,'soundboardSettings').src[soundNr];
            const ret = await FilePicker.browse("data", src, {wildcard:true});
            const files = ret.files;
            if (files.length == 1) src = files;
            else {
                let value = Math.floor(Math.random() * Math.floor(files.length));
                src = files[value];
            }
        }
        else {
            const sounds = game.playlists.entities.find(p => p._id == playlistId).data.sounds;
            const sound = sounds.find(p => p._id == trackId);
            if (sound == undefined){
                activeSounds[soundNr] = false;
                return;
            }
            src = sound.path;
        }
        
        volume *= game.settings.get("core", "globalInterfaceVolume");
        let howl = new Howl({src, volume, loop: repeat, onend: (id)=>{
            if (repeat == false){
                activeSounds[soundNr] = false;
            }
        },
        onstop: (id)=>{
            activeSounds[soundNr] = false;
        }});
        howl.play();
        activeSounds[soundNr] = howl;
   }
   else {
       activeSounds[soundNr].stop();
   }
}