Analysis lost after opening game from database

[csaavedra]

When on the analysis board, after making moves and having concrete lines being analysed, if you open a game from the game database tab, going back to the analysis board (back button or gesture) opens an analysis board with only the starting position and all previously analysed lines lost.

This basically makes it impossible to use the app to study an opening and consult master games from a given position, and what's worse, it's not difficult to accidentally tap on a database game by accident and end up losing the lines being analysed.

The app should save the state of the analysis board and restore it when navigating back to it.