Add toggle current round ID action

...ech/apply/funds/templates/funds/submissions_by_round.html

opentech/static_src/src/app/src/SubmissionsByRoundApp.js

...src/src/app/src/containers/SubmissionsByRoundContainer.js

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

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

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

...ech/static_src/src/app/src/redux/selectors/submissions.js

opentech/static_src/src/app/webpack.base.config.js

package-lock.json

package.json