@Catrope noted while reviewing T244546: Newcomer tasks: guidance root screen
This is a semi-preexisting issue, but the "back" button in the general-help/search panels looks different from the "back" button in the ask-help panel, because the former is an action and the latter is in a padded PanelLayout in the footer. The former is frameless and has no padding around it, whereas the latter is framed and does have padding around it. This doesn't have to be addressed in this commit, but we should probably unify these two competing designs soon.