Add key bindings to toggle the project panel

- Use `cmd-1` to open the project panel and toggle focus between it and the workspace center.
- Use `cmd-shift-1` to open or close the project panel.
2b3e5945c6Max Brunsfeld committed on 9/30/2021, 10:26:14 PMparent8dcd38c
3 files changedLine totals unavailable