UI navigation issue

[testman42]

When you select a talk from your bookmark list, and then you do the "Back" gesture or press the arrow in top left corner, you expect to be brought back to bookmarks, not to the list of tracks for that room where the talk is happening.

[cbeyls]

The back gesture should do the same as the classic bottom back button: navigate back to the screen you were before, no matter which one it was. If the back gesture doesn't behave like that, then it's a bug I need to investigate.

The button at the top left is an "up" button, which navigates to the upper hierarchical level of the session, which is the track. This is actually a feature which allows you to reach the track even if you reached the session through another entry point. But I understand it may be confusing because many apps don't behave like that and most users assume they are both back buttons.