Keyboard focus not assigned to "Heading style" dropdown, cannot use keyboard arrows/Esc

[nyanpasu64]

[Description]:

When I open a note and click on the "Aa↓" heading/body selector, keyboard focus remains in the document instead of the list of styles.

[Affected versions]:

Desktop 4.2.0

[Prerequisites]:

Install the extension and create a note. Optionally add some text.

[Steps to reproduce]:

• Open a note, focus cursor in text field.
• Click "Aa↓" to open the "Heading 1/2/3, Body" dropdown list.
• Press keyboard Up/Down arrows, or Esc key.

[Expected result]:

Keyboard scrolls through heading and body styles. Pressing Esc closes the dropdown.

[Actual result]:

Caret scrolls through note text. Pressing Esc does not clear the dropdown, it continues obstructing the notes.

[Additional Notes]: