Keyboard arrow navigation reverts to tab-focused emoji when pressing tab

[runerune]

Keyboard arrow navigation reverts to tab-focused emoji when pressing tab, making it extremely tedious to select emojis with keyboard.

To Reproduce

1. Open the picker window.
2. Press TAB to defocus the input field.
3. Press DOWN ARROW 20 times.
4. Press TAB again.

Expected behavior
Arrow keys should move focus in the main window, not just scroll the list. Pressing TAB on a list that's been scrolled down should select the first emoji visible, not scroll back to the top of the list.

• OS: Windows 10
• Version 2.3.0