Columns UI crashes when deleting final column

[jokuNimi]

Steps to reproduce

• Run topydo -c [empty config] columns -l [empty column config]
• Add a new column using A key, and only define the name
• Press D to delete the newly made column
• Click default "All tasks" column
• The columns UI closes with no error message

After pressing D the focus of the UI is not on any column, and pressing arrow keys does nothing. Deleting a non-final column when there are more than two columns works as expected (although I would rather have it move focus to a column, now you need to press an arrow key). Deleting the first of two columns takes focus away from the only remaining column, and clicking on it does nothing (but doesn't cause a crash).

I didn't find a way to get any more detailed logs. I would be happy to provide those if somebody tells me how. topydo -v = topydo 0.14, running on arch linux and kitty terminal.