Note: remove asyncFocus, restore focus on create

[ethan-james]

Fixes #2691

Calling asyncFocus() was blurring the editable, setting editing to false and triggering the whole editable's onFocus routine which calls setCursorOnThought with no offset. Without asyncFocus(), the caret pops back up to the end of the thought when a note is deleted.

Notes were also failing to focus in certain situations such as the following:

1. Delete an existing note (caret returns to main thought)
2. Close the keyboard
3. Create a note via gesture
4. No caret, keyboard stays closed

Explicitly calling focus() on the node causes it to focus regardless of how many previous notes have been edited or deleted.

[trevinhofmann]

Thank you for the pull request, @ethan-james. Focus after deleting (and recreating) notes appears to be working as expected on iOS Safari:

Demo 1

note-1.mp4

Demo 1

note-2.mp4