Web app: Unable to navigate to the note editing area with screen reader

### Expected
I would expect to be able to navigate to the note editing area to edit notes with a screen reader (NVDA).

### Observed

The cursor skipped the note editing area from the search bar and moved to the tags section.

### Reproduced

*Exact steps shared in 3354940-zen*

1. Open Simplenote web app (https://app.simplenote.com/)
2. Find and open one note.
3. Press e to move to the next edit field. (Here user could search their notes.)
4. Press e to move to the next edit field. (In the previous version, here the user could modify their notes.)
5. The cursor moves to the next edit field (added tag).

### Where did you see the bug

- OS: Windows
- OS version: 10.0.18363
- Browser (if applicable): Mozilla Firefox
- Browser version (if applicable): 81.0 (x64 zh-TW)
- Simplenote app version: https://app.simplenote.com
- The version of the NVDA screen reader: 2020.2

Reported in 3354940-zen.

Open the Simplenote web app in Firefox on Windows and reproduce the navigation sequence with NVDA: open a note and press e through the search and edit fields. Trace the web app's note view and editing controls to find why the note editor is skipped; done means NVDA can reach the note editing area before the tags field.

Written by the indexing model from the issue text.