Add changing a status

opentech/apply/funds/api_views.py

opentech/apply/funds/serializers.py

opentech/static_src/src/app/src/api/index.js

opentech/static_src/src/app/src/api/submissions.js

opentech/static_src/src/app/src/components/Modal/index.js

...h/static_src/src/app/src/containers/DisplayPanel/index.js

opentech/static_src/src/app/src/containers/StatusActions.js

opentech/static_src/src/app/src/redux/actions/submissions.js

opentech/static_src/src/app/src/redux/middleware/api.js