'Returns a formatted string containing the short_descs for all actions.'

def _GetActionDescriptions(self):

    action_names = self.actions.keys()
    action_names.sort()
    desc = ''
    for action_name in action_names:
        if (not self.actions[action_name].hidden):
            desc += ('        %s:    %s\n' % (action_name, self.actions[action_name].short_desc))
    return desc
