Major: 0.4.39

Updates:
1. Correct the set row property policy.
Major: 0.4.40

New Features:
1. Add music specific tab widget, for main player.

Bug Fixed:
1. Fixed the bug which might cause delete an object for two times.
Major: 0.4.41

New Features:
1. Now tree view can know their music tab.
Major: 0.4.41

New Features:
1. Now playing module is now saving the music tab.
Major: 0.4.41

New Features:
1. Add show index in model functions for all music tab.
Major: 0.4.41

New Features:
1. Add show current index in original tab functions for now playing.
Major: 0.4.42

Updates:
1. Linked the append locate song function to now playing’s
showCurrentIndexInOriginalTab().
Major: 0.4.43

New Features:
1. Initial support find the playlist.