[Lock Screen] Add an "unlock" feedback #787
Description
On iOS, which has the FaceID unlocking feature, sometimes the unlock process happens so fast the user is not aware the wallet was actually unlocked. This may cause trust issues for the user that may think the wallet was always unlocked.
To reproduce this issue, go to the "Settings" -> "Security" screen, activate the FaceID biometry and click "Lock Screen".
If the OS response is fast enough, the user may have trouble identifying the screen was even locked once, and will just notice the navigation to the Dashboard.
This was noted on the v0.34.1 release.