Refactor magic recipients field when sending new message.

Uses local cache of user mappings instead of AJAX calls; has just enough
customization hooks to allow for a department/user mapping for MJ...

tailbone/views/autocomplete.py

@@ -63,6 +63,9 @@ class AutocompleteView(View):
         """
         return instance.uuid
 
+    def get_data(self, term):
+        return self.query(term).all()
+
     def __call__(self):
         """
         View implementation.
@@ -73,5 +76,5 @@ class AutocompleteView(View):
             term = self.prepare_term(term)
         if not term:
             return []
-        results = self.query(term).all()
+        results = self.get_data(term)
         return [{'label': self.display(x), 'value': self.value(x)} for x in results]