Cross Collection And dock

I use iTunes to manage my music. So I just add my top used iTunes playlist to the collection. It's a folder with sub folders. I go back n forth on the dock between collection, files and iTunes. Well the problem is Cross closes the folders evertime I switch between the 3. So I have to open folders in iTunes. Then go back to collection playlist open all the folders again and this process is repeated the whole night. Why not let the folders and sub folders stay open at least until I close Cross.