The new implementation will store the master password in the keyring instead of storing each and every server password separately. The master password will be used to encrypt/decrypt server password when storing in the pgAdmin config DB.
1) Do not use Array index in keys.
2) Unnecessary escape character.
3) Rename this local variable to match the regular expression ^[_a-z][a-z0-9_]*$
4) Remove the unused local variable.
1) Ensure that SSH Tunnel should work properly after upgrading to 7.2 from 7.1. #6341
2) Ensure that the master password dialog should not visible if the parameter MASTER_PASSWORD_REQUIRED is set to False. #6353