[Crash] Adding git remote from CLI

[VojtaStruhar]

Fork crashed on me today, so I thought I'd report it

1. I have a forked github repo, open in Fork. The origin remote refers to the fork.
2. I added an upstream remote that points to the original repo in Terminal, not via Fork
3. git fetch upstream in Terminal
4. Switch to Fork
5. Press Fetch button, just to update the tree UI
6. Fork crashed

I'm actually not 100% sure if it managed to perform step 5 before it crashed. Sometimes it fetches automatically, so maybe I didn't even need to press the button.

Weird mix of CLI and GUI. Not a huge problem imo.

[DanPristupov]

Hi. Thank you for the bug report.