configd, templates, add sortDictList to helpers. closes...

configd, templates, add sortDictList to helpers. closes https://github.com/opnsense/core/issues/1641

example usage:
{%  for item in helpers.sortDictList(OPNsense.ConfigObject, 'description') %}
    {{item.description}}
{%  endfor %}

src/opnsense/service/modules/addons/template_helpers.py

@@ -29,6 +29,7 @@
 """
 
 import netaddr
+import operator
 
 
 # noinspection PyPep8Naming
@@ -116,3 +117,11 @@ class Helpers(object):
             :return: IPNetwork
         """
         return netaddr.IPNetwork(network)
+
+    @staticmethod
+    def sortDictList(lst, *operators):
+        if type(lst) == list:
+            lst.sort(key=operator.itemgetter(*operators))
+        elif type(lst) == dict:
+            return [lst]
+        return lst