Highlight selected file in file browser

[Borewit]

When opening a track or playlists, also select the selected file in Explorer.

As Desktop.Action.BROWSE_FILE_DIR action, which seems the closest operation to achieve that, is both not supported in Windows and Java at this moment, I wrote a fallback like:

 Runtime.getRuntime().exec(String.format("explorer.exe /select,\"%s\"", path));

Also removes a very hacky way to open playlists (by first generating a .bat file)

Resolves #116

[Borewit]

Build listFix_2.7.0-PR156-1.exe

[Borewit]

Does this PR (Build) solve #116 @touwys?

[touwys]

Build listFix_2.7.0-PR156-1.exe

Does this PR (Build) solve #116 @touwys?

Yes, it did so very nicely, thank you.