'Return the activated plugins.
:return: all the plugins that are active.'

def get_activated_plugins(self):

    result = []
    for row in self.treestore:
        plugins = []
        ptype = row[3]
        for childrow in self._get_children(row.path):
            plugin = childrow[3]
            if childrow[1]:
                plugins.append(plugin)
        if plugins:
            result.append((ptype, plugins))
    return result
