When computing dirs for filtering, need to limit the replacement of the top_path to 1, else for, e.g. /mnt, we end up replacing all / characters...
Some browsers (chrome, ie) do not support margin-left style specs on <option> elements. Use multiple nbsps instead. Yes ugly... temp workaround while waiting for a master of style ?
Merge pull request #24 from medoc92/master

Fixes to the directory filter list