Preserve icon kwargs

Allow other icon instances to reuse the arguments like
the symbol.

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

mayan/apps/appearance/classes.py

@@ -96,6 +96,7 @@ class FontAwesomeLayersDriver(IconDriver):
 
 class Icon(object):
     def __init__(self, driver_name, **kwargs):
+        self.kwargs = kwargs
         self.driver = IconDriver.get(name=driver_name)(**kwargs)
 
     def render(self, **kwargs):