[KevinH]

The EditToC dialog was what the bug report was about. The list box itself now has focus but nothing is selected. This makes sense as technically this list could be empty. Using the down arrow to actually select a line works in my testing. No tab was needed to shift focus anyplace. I assume your space just selects the first line like a down arrow would.
Since when editing a ToC there is no rule you must start at the top. Giving the List widget focus is the right thing to do here.

I did not see a report about SpellCheck but I will look into that. Thanks.

Update: Checked out the code for Spellcheck and there are no changes there from earlier Sigil 2.1.0, so click or tab to focus on what you want will still be required.