ssh-agent keys are not used

[khaeru]

I use ssh-agent in order to cache keys and avoid re-entering long passphrases within a session.

I…

1. Add a key to the agent, e.g. by using SSH from the command line.
2. Open the Atom snap.
3. Use a git remote operation, like fetch or push.

At this point I expect (from the behaviour of non-snap versions of Atom that I used previously):
4. Atom uses the ssh-agent cached key, without prompting me for a passphrase.

Instead:
4. Atom prompts me for the passphrase to unlock the key.