replace root.currentIndex to currentPlaylistView.currentIndex
replace root.currentIndex to currentPlaylistView.currentIndex

Change-Id: Iec02f513d5c18b4b6562ff74b011de7e5d7c03e3
Reviewed-on: http://cr.qtquick.me/169
Tested-by: http://ci.qtquick.me/
Tested-by: Takahiro Hashimoto <b59128e2582a625f3a4337ede555b631692b1b94@qtquick.me>
Reviewed-by: Takahiro Hashimoto <b59128e2582a625f3a4337ede555b631692b1b94@qtquick.me>

qt-users-jp/qumoplayer,qt-users-jp/qumoplayer,qt-users-jp/qumoplayer