Careful don't register file type as .tid

[linonetwo]

In my https://github.com/tiddly-gittly/flow-chart plugin, previously, it register application/flow-chart as .tid cause .tid file can't parse correctly by nodejs wiki.

if use

module-type: startup
title: $:/plugins/linonetwo/itonnote/Startup/registerFileType.js
type: application/javascript

$tw.utils.registerFileType('application/flow-chart', 'utf8', '.tid');

, $tw.utils.getFileExtensionInfo(type) will return { type: 'application/flow-chart' }

and cause tiddler parsed as plan text, and title will use file's path, instead of title in metadata section on the top. This will cause confusing result, like most of plugin .tid contents missing, while tiddlers from .multid still exists