Adjusted C++ code to handle with new and renamed objects, as well as
properties with different types.
As a result of changing types, the QML side had to be updated as well.
I hope I found everything by manually testing.
Additionally, the Qt Quick application has been updated to test the
remote sessions more easily and to make it launch again.
* PlaybackManager has been updated to workaround limitiations in
QtMultimedia
* PlaybackManager now sends the DeviceProfile to the server when
determining the playback url. This makes the Jellyfin server send
information back about transcoding.
* The DeviceProfile type has been changed from an QJsonObject into the
DTO generated by the OpenAPI descripton.
* A settings page has been added on SailfishOS that allows the user to
configure the PlaybackManager to their whishes.
* The DebugInfo page on SailfishOS now persists its settings (closes #8)
