ashwin/pooja removing duplicated message in LC_messages en and fr
anishek/pooja | #1993 | excel export now uses predefined styles
anishek/pooja | #1993 | using predefined styles and adding tests for the same.
Revert "Heri | #1881: Answer type is not editable"

This reverts commit 53dbc0859ac9472639982d1a6864e9262975a7a2.

Conflicts:

	datawinners/project/views.py
Shruthi/Pooja - #2006 - Returning string value if submission logs are not mapped to a form model revision
Merge branch '5_0_release' into develop