Move jinja filter import below app initialization
Move jinja filter import below app initialization

This lets us reference objects on the app in the filters without
creating circular imports.

ascoderu/opwen-cloudserver,ascoderu/opwen-webapp,OPWEN/opwen-webapp,OPWEN/opwen-webapp,ascoderu/opwen-webapp,ascoderu/opwen-cloudserver,OPWEN/opwen-webapp,ascoderu/opwen-webapp