'When the users preses enter, if the workspace exists,
select it. If not, present the window to create a workspace with
that name'

def on_search_enter_key(self, entry):

    selection = self.ws_view.get_selection()
    (model, ws_iter) = selection.get_selected()
    if (ws_iter is None):
        self.create_ws(title=entry.get_text())
        entry.set_text('')
    else:
        self.change_ws(self.get_selected_ws_name())
        ws_iter = self.get_selected_ws_iter()
        entry.set_text('')
        self.select_ws_by_iter(ws_iter)
