feat: Scroll to top on LockedWallet

[tuliomir]

If the wallet is locked while the screen is scrolled down, the LockedScreen is also loaded scrolled, hiding its visual elements. This PR fixes this.

Acceptance Criteria

• Everytime the LockedScreen is loaded, all elements should be visible

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.