DSUtil: Added default value for escape character.
Changed parameter order of ExplodeEsc since the escape character will rarely be specified.
CFavoriteOrganizeDlg: Fixed renaming of favorites.
The bug was introduced in af6670d1c99b19b74a3544fc8972635f795d8124 due to a misinterpretation of the original code.
Updated Basque translation.

Refs: #2890.