Return a proper list of SearchModel instances (Python 3).

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -13,6 +13,8 @@
 * Add stricted error checking to the crop transformation.
 * Update compressed files class module to work with Python 3.
 * Update document parsing app tests to work with Python 3.
+* Handle office files in explicit binary mode for Python 3.
+* Return a proper list of SearchModel instances (Python 3).
 
 3.1.4 (2018-10-4)
 =================

mayan/apps/dynamic_search/classes.py

@@ -26,7 +26,7 @@ class SearchModel(object):
 
     @classmethod
     def all(cls):
-        return cls._registry.values()
+        return list(cls._registry.values())
 
     @classmethod
     def as_choices(cls):