Feature request: Ask or Set a pin when activate Setting "Lock app with PIN"

[12remember]

Problem: At the moment the setting "Lock app with PIN" can be activated without confirming or setting the PIN. It is automatically the same PIN as the activated wallet. Say you have 3 wallets with 3 different pins. When switching between wallets it is easily to forget which wallet is active and thereby it is hard to remember which of the 3 pins will unlock the mobile app. Resulting in a lot of wrong PIN inputs and thereby a 5 min penalty to try it again.

Proposal
Solution 1: Set a single PIN to access the app
Solution 2: All three PIN are correct to acces the app.