Convert document thumbnails, preview, image preview and staging files to template base widgets. Unify all updated widgets. Display resolution settings are now specified as width and height and not a single resolution value.

Signed-off-by: Michael Price <loneviking72@gmail.com>

mayan/apps/common/utils.py

@@ -98,13 +98,6 @@ def get_descriptor(file_input, read=True):
         return file_input
 
 
-def index_or_default(instance, index, default):
-    try:
-        return instance[index]
-    except IndexError:
-        return default
-
-
 def TemporaryFile(*args, **kwargs):
     kwargs.update({'dir': setting_temporary_directory.value})
     return tempfile.TemporaryFile(*args, **kwargs)