Steps to Reproduce (for bugs)

1. Create an entry with a website
2. Go to the Icon tab
3. Select download favicon
4. Select the newly downloaded favicon
5. Select OK

Context

I was trying to update all of my passwords to use the favicons of the sites, but this bug made it very annoying to do so.

It doesn't seem to crash when selecting that favicon again after the first time.

Your Environment

• KeePassXC version/commit used: v2.10
• Operating System and version: MacOS 10.12.1