:memo: rc31: ftl:ready waits for configure, bound l10n, the ful-hidden layer, sorter arrows, no-input and totalSize, first after a failed section; element reference regenerated
:memo: a superseded section answer still writes its content, and the section's loading and error hooks
:doc: async listeners are registered through asyncOn, and what a plain listener does instead
:ref: doc and examples
:ref: doc