FiiO X3 Portable Player Firmware 1.31

Fixes:
- Redefine the volume button
- Language selection prompts on initial booting
- Amended the play mode of shuffle play
- Quickened the text scroll speed, and lowered its power consumption
- Modified the booting operation
- Modified the sequence of CUE file and single song file
- Discharged the limit of folder number
- Fixes the noise issue in changing tracks of m4a.cue file
- Fixes the issue of system freeze problem when updating lib for some songs
- Fixes the issue that, when playing wma file, there would be one big noise if you rewind to the beginning of the song to replay it
- Fixes the issue of messy code caused by changing theme
- Fixes the issue of playing by artists for CUE file
- Fixes the issue that, under “Idle Power off” settings, it would shut down for saving power if simultaneously playing and updating lib
- Fixed the issue of system freeze problem by the cover of some lib files
- Changed some French texts