Looking for .btn-primary could yield two results when a notification is active
with an action button of type primary. This results in form not getting
submitted properly and test failing with wait timeout. Fix this by making the
lookup for submit button more specific.
Tests:
- Run matrix-synapse functional tests on a fresh container.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>