GH-877: Fetch notes every 30 seconds

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

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

.../static_src/src/app/src/components/InlineLoading/index.js

...atic_src/src/app/src/components/InlineLoading/styles.scss

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

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

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

...tech/static_src/src/app/src/redux/reducers/submissions.js

opentech/static_src/src/app/src/redux/selectors/notes.js