Pre-conditions:
A vault with an imported account exists
Steps to reproduce:
- Navigate to 'Download account keys' screen
- Provide a valid password and click on 'Download' button
- Observer that success screen ('Your secret key was downloaded') is displayed
- Open default 'Downloads' folder
Expected result: .pem key of an imported account is present in default 'Downloads' folder
Actual result: .pem key is not present in 'Downloads' folder
