New features:

* Path in folder view is clickable to navigate

Improvements, optimisations and bug fixes:

* Fix updates check other channel than stable.
* Remove the letter separator in the playback list view and album view
* Fix sorting crash by dates
* Added a space between the form and the button in the timer form dialog
* Fix sorting options when leaving sort dialog without applying modification, previous values are restored
* Music in different storage are no more on the first folder alongside the "This device" folder
* Improve design of list
* No more folder associated to the file name created
* The back folder can be clicked once by view (it prevents going to blank view if clicked too fast)