The `tm-unfold-all-tiddlers` message unfolds all tiddlers in the current story list. It does so by setting the text of all state tiddlers to: "<<.value "show">>".
<<.tip "The core uses a foldStatePrefix of `$:/state/folded/` to store the fold states for the default story view.">>
<<.warning "The state tiddlers title is computed as `foldStatePrefix + TiddlerTitle`. If the foldStatePrefix is not set, it will overwrite the text of the tiddler(s) itself, resulting in data loss. ">>