sort tracks alphabetically when dropping folders

[ciros88]

when dropping tracks to tracklist/playlists windows, no sorting happens (the order comes from the source);
when droppings folders to tracklist/playlists windows instead, the tracklist entries seems non-alphabetically sorted (maybe natural sort it is used): alphabetical sorting should be most appropriate. here an example of a dropped folder:

• current behaviour:
  

• desidered behaviour:
  

example files (put all of them in the same folder):
sorting 1.zip
sorting 2.zip

[aargirakis]

It's based on how the filesystem sort the files. It's like "get all the files from the current folder". So if we want another sorting we have to sort it ourself. Which will add some sort delay.

[aargirakis]

Actually you there is an option from Qt to sort the files:
https://doc.qt.io/qt-6/qdir.html#SortFlag-enum
Tried some and natural sorting doesn't seem supported though.