[Alt] + [letter] jumps to an artist song beginning with [letter] : only works on first folder

[grgohr]

I have several root folders in the songs folder, and the [Alt] + [letter] only works in the first one, does nothing in other folders

[TeLiXj]

fixed in 38474c91a20e87ccb2715aa2d6059dc7c9b47e96