* Add Merging Playlist
Add Merging Playlist function in my playlist
* Mirror fix
fix some mirror bugs
* Revert "Mirror fix"
This reverts commit 0c77b4ce6c4780a623a7c3a50e383d24a685fda7.
* Revert "Revert "Mirror fix""
This reverts commit 239f018f706edeb3d92006db69d8439c81198136.
* Minor fixes
* Code improvement
clean some code and fix some issues