iOS - Discussions - App do not show focus on posts screen
When user moves from 'Create a new post' screen to 'All Posts' screen by tapping 'Cancel' button which appears on top left on 'Create a new post' screen, app do not show focus on 'All Posts' screen. When user tap anywhere, app will read left drawer in background but showing posts screen in front end.
Steps to Reproduce
1) Login to edX app.
2) Tap on any course from 'My Courses' screen.
3) Tap on 'Discussions' tab.
4) Tap on 'Create a new post'.
5) Tap on 'Cancel' button on top left and view.