Creating a new note from Trash via shortcut should be forbidden

### Expected
If the `new-note` button is disabled when in `Trash`, the shortcut should not work too (same for menu item).

### Observed
`Ctrl+Shift+I` shortcut will switch the app to weird state: there will be still `Trash` header, but notes will be shown from `All Notes`, and also there will be the `Empty Trash` button:

https://user-images.githubusercontent.com/73365754/110797256-91984680-8281-11eb-9212-ca345c842c82.mov

### Reproduced
1. Open `Trash`
2. Press `Ctrl+Shift+I`

### Where did you see the bug
- System Make: Parallels Desktop on MBP 16"
- System Model: Parallels Desktop on MBP 16"
- OS: Windows
- OS version: 10 Home 20H2 build 19042.508
- Browser (if applicable): x
- Browser version (if applicable): x
- Simplenote app version: 2.8.0-beta2 desktop

Start by reproducing the Ctrl+Shift+I shortcut while viewing Trash, then trace the shortcut and menu action that create a new note. Compare them with the disabled new-note button behavior. Done means both shortcut and menu item are blocked in Trash and the view remains unchanged.

Written by the indexing model from the issue text.