Audio track numbering in files

[Dauma]

There's different interpreting of audio track numbering in compilation and file browser. When adding audio tracks to compilation, when compilation is empty, track numbering could stay the same.

Situation, correct:
01. artist - track
02. artist - track
..
10. artist - track
11. artist - track
When adding - adds in correct order, 1, 2,  10, 11.

Situation, incorrect:
1. artist - track
2. artsit - track
..
10. artist - track
11. artist - track
When adding, adds 1, then 10, then 11, then 2. In browser it takes order 1, 2, 10, 11.