Bug: Password generation UI not accessible after new field is made

[rbajevs]

When I try to create a new password field for a login that already existed and then generate a password for it the Generate Password button doesn't do anything. The entry needs to be saved then reopened in order to get the password generate UI to show up. Tested on two different iPads, for different entries. 

This is only an issue for editing an existing entry, not for new ones being created. 

iOS 12.1.1

Enpass Version: 6.0.2 (210)