[iOS] Back button doesn't work on Backup settings screen

[mariia-skrypnyk]

Bug Report

Problem

This issue occurs in our legacy settings, which are no longer actively in use.
While it's still possible to swipe right and exit the screen, the fact that the button is present but not functioning is still a low-priority issue.

Reproduction

1. Login to app
2. Turn on mainnet
3. Go to Profile -> Legacy Settings -> Sync Settings -> Backup settings

Actual behavior

Back button doesn't work

Expected behavior

Back button works and navigate user to the screen from which Profile was opened

Additional Information

• Status version: nightly 22/10
• Operating System: iOS

[ilmotta]

@mariia-skrypnyk I'm closing this issue as not planned because we should actually finish rewriting the legacy screens and then I'm sure the back button will work. We might achieve this in 2.32.

We can track progress in this issue #21360, which I have tentatively added to 2.32.