In-progress browser for a directory of text files
update_all_editors = function(node, dt)
	if node.type == 'text' and not node.button then
		edit.update(node.editor, dt)
	elseif node.type == 'rows' or node.type == 'cols' then
		for _,child in ipairs(node.data) do
			update_all_editors(child, dt)
		end
	end
end