Fix: Root category list dialog sometimes skipped
Fix: Root category list dialog sometimes skipped

If a subcategory only had one item, the root category controller would
be removed from the controller history when skipping to the edit
category dialog even if the root category list had more than one item.
This could happen if there were multiple root categories, but one was
selected that had less than two subcategories. It was a simple one-line
fix, but easy to miss.

jazzhead/log-page,jazzhead/log-page