Refactoring guidelineLoading.html

Signed-off-by: J. Renée Beach <splendidnoise@gmail.com>
Deleted guidelineLoading. It's tested in numerous ways in other tests and it's causing all kinds of wacky problems with testrunner.

Signed-off-by: J. Renée Beach <splendidnoise@gmail.com>
Converted core/guidelineFallback and languageChangesAreIdentified.

Signed-off-by: J. Renée Beach <splendidnoise@gmail.com>