Clicking "Open In Editor" deletes current work

[ElykDeer]

Repro:

1. Create a new snippet
2. Work real hard, type lots of code
3. Decide you want to work in your normal editor, click "Open in Editor"
4. Resets the file back to being empty

We should probably just save before opening in their editor? At least if the edits are more recent than the last saved timestamp