Add toggles dict helper
Add help text feature flag
Add features to vellum
Merge branch 'master' into vellum-feature-flags

Conflicts:
	corehq/toggles.py
pep8
handle multiple results for FormQuestionSchema
use constant IDs for FormQuestionSchemas
optionally log missing forms
Merge pull request #5048 from dimagi/missing-xmlns

optionally log missing forms
make submission editing toggle-able by domain
Add domains to feature toggle dict
Merge pull request #5051 from dimagi/edit-submit-domain-toggle

make submission editing toggle-able by domain
Merge pull request #5040 from dimagi/vellum-feature-flags

Vellum feature flags
Merge pull request #5047 from dimagi/get-schema

handle multiple results for FormQuestionSchema
allow data source config filter to accept multiple doc_types
add deleted_filter to DataSourceConfiguration
use deleted_filter in pillow
update staging.yaml

[ci skip]
Merge remote-tracking branch 'origin/caching-speedups' into autostaging
Merge remote-tracking branch 'origin/subscription-no-contact-info' into autostaging