(cherry picked from commit 900be8b7)

(cherry picked from commit b2588283)

(cherry picked from commit 2de5161f)

(cherry picked from commit 2809d417)

(cherry picked from commit 42d48603)

As loadLastPlaylist is now threaded, we cannot immediately have a
current media.

(cherry picked from commit 7b53c068)

(cherry picked from commit 19d97a9a)

(cherry picked from commit 71e6ca9c)

(cherry picked from commit 0a4a7a00)

(cherry picked from commit 54ce0b27)

(cherry picked from commit 8649ca16)

(cherry picked from commit f000fc62)

Close #420

(cherry picked from commit 23e94289)

(cherry picked from commit 5ad3cd8d)

(cherry picked from commit bf5b98b1)

(cherry picked from commit d2617456)

(cherry picked from commit 2f602fbf)

(cherry picked from commit c3502e93)

(cherry picked from commit 85aac906)

(cherry picked from commit 2f3476ef)

(cherry picked from commit 8f9cfd48)

(cherry picked from commit 6d2d4de4)

(cherry picked from commit 8ec167e8)

The media will now be always valid from this event.

(cherry picked from commit e27b1274)

(cherry picked from commit c692fa62)

(cherry picked from commit 45c45adb)

(cherry picked from commit 134aa98a)

(cherry picked from commit 0502fcfd)

(cherry picked from commit 8c3af754)

cf. comment

(cherry picked from commit 0315a5b9)

(cherry picked from commit 25029ea3)

Because all audio stream are aliased on STREAM_MUSIC on TV