Change AnnouncePlayerPlay to announce speed == 0 for pausing slideshow or picture.
[Settings] Make Settings level lockable
[Settings] Treat 'Set as default' in CGUIDialogXXXSettings as expert level
Merge pull request #2865 from Fice/lockable_settings

profiles: allow settings to be locked on specific levels
Merge pull request #2573 from ulion/slideshow_announce_onplay_speed_zero_for_pausing

jsonrpc: change Player.OnPlay to announce speed 0 for pausing slideshow or picture