index.html: Move the script includes for main.dart and dart.js  to the top, in the hopes this fixes random null refs in message_component.highligt().
index.html: Move the script includes for main.dart and dart.js  to the top, in the hopes this fixes random null refs in message_component.highligt().

magnussuther/chrome-extension-saml-decoder,magnussuther/chrome-extension-saml-decoder,magnussuther/chrome-extension-saml-decoder,magnussuther/chrome-extension-saml-decoder