Update Flow extension in wmf/1.24wmf14

Applies patches discussed on the teams trello board at
https://trello.com/c/Adq4N0JL/442-backport-e-101-e-102-e-103-to-mediawiki-org-asap

These are E101, E102 and E103.

Change-Id: Idaad277355e4ba804080089d4887186490a7dbcf
Merge "Update Flow extension in wmf/1.24wmf14" into wmf/1.24wmf14