Added Direct Play and websocket improvements

* [backend]: Websocket now automatically tries to reconnect if connection was lost, up to 3 times.
* [backend]: Move more playback and resume logic to the backend, to avoid having it in multiple places within the QML. Regression: pausing playback sometimes halts the video player for an unknown reason.
* [playback]: Sailfin will try to play without the server transcoding, if possible.
* [ui]: added a debug page in the settings

sailfish/qml/pages/itemdetails/MusicAlbumPage.qml

@@ -73,10 +73,13 @@ BaseDetailPage {
                 }
             }
             delegate: SongDelegate {
+                id: songDelegate
                 name: model.name
                 artists: model.artists
                 duration: model.runTimeTicks
                 indexNumber: model.indexNumber
+                onClicked: window.playbackManager.item = Qt.createQmlObject("import nl.netsoj.chris.Jellyfin 1.0;"
+                    + "JellyfinItem { jellyfinId: \"" + model.id + "\"; apiClient: ApiClient; }", songDelegate, "nonexistent.qml");
             }
 
             VerticalScrollDecorator {}