Persist ui flow state when redirecting

Based on https://github.com/Rise-Vision/angular-ui-flow-manager/pull/3
@olegrise Yes. I'm still waiting for a PR to be merged in https://github.com/Rise-Vision/widget-tester which angular-ui-flow-manager depends on. I will change this back to ```https://github.com/Rise-Vision/angular-ui-flow-manager.git``` once that PR has been merged.