Add setting to have contents deleted if leave app

[OddHouseGames]

There should be a setting that allows auto closure of website when leaving app focus/return to iOS home screen. Instead of having to manually hit the delete/trash can everytime.

┆Issue is synchronized with this Jira Task

[razvanlitianu]

@rtestard are we considering this?

[rtestard]

I think we should, this sounds valuable, let's keep this one