Enhancement Request: add a "lock" button on the KDX UI Wallet Tab, so you can hide your balance but leave KDX running and sync'd

[crProductGuy]

As a home wallet/node user, I want to keep my laptops running KDX live continuously. I occasionally want to be able to see my balance or next receive address, but be able to re-lock the wallet without having to exit KDX and re-start it, so that I reduce the risk of someone seeing my balance or sending funds if they broke in and saw the laptop and the KDX UI.

Describe the solution you'd like
Place a "lock" button on the wallet tab, preferably at the top of the column of green buttons, just above the "Compound Transactions" button.
The effect of the button would be to return the wallet to the screen where you can enter a password to open a wallet or create a new wallet.

Describe alternatives you've considered
The only way I've found to lock the wallet is to exit KDX on my Mac or PC, (after stopping the background process), then restarted it to keep it running & sync'd, but locked.

Additional context
Add any other context or screenshots about the feature request here.