b->Add (_content_add_folder, 1, wxEXPAND | wxLEFT | wxRIGHT);
_content_remove = new wxButton (_content_panel, wxID_ANY, _("Remove"));
b->Add (_content_remove, 1, wxEXPAND | wxLEFT | wxRIGHT);
b->Add (_content_add_folder, 1, wxEXPAND | wxLEFT | wxRIGHT);
_content_remove = new wxButton (_content_panel, wxID_ANY, _("Remove"));
b->Add (_content_remove, 1, wxEXPAND | wxLEFT | wxRIGHT);