`Find in Note` is the same as `Search Notes...`

### Expected

When I go to `Edit` > `Find in Note`, I'd expect the search to be done only on the current note

### Observed

When I go to `File` > `Find in Note`, the search is done across all notes.

Effectively, there is no difference between the `Edit` > `Find in Note` and `Edit` > `Search Notes...` menu actions

### Reproduced

1. Start app
2. Go to `File` > `Find in Note` menu
3. Type a keyword to search on
4. Observe all matching keywords on the `All Notes` list being highlighted. The search is done across notes.

### Where did you see the bug

- System Make: N/A
- System Model: N/A
- OS: Ubuntu
- OS version: 20.04
- Browser (if applicable): N/A (in app)
- Browser version (if applicable): N/A (in app)
- Simplenote app version: 2.7.1