feat: Popup on the Settings screen when user leaves the page without saving

[phoebe-buffay]

What feature?

When user is on Settings page and makes some changes, then doesn't click on Save Changes and decided to leave the page.

• if user wants to leave exactly the Settings page and remain inside the app, the custom popup should appear
• popup should have close icon in the up right corner so user can close the popup
• if user clicks on Yes, the changes are not saved and user is relocated to the desired page
• if user clicks on Cancel, user remains on Settings page and can make other changes and save them manually

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