Phrase Jumble HTML Component
Simple HTML component <jumble-phrase> which displays a jumbled-up
phrase. Attributes:
phrase: The phrase to be jumbled.
category: The phrase category.
Multiple states:
init: Phrase is shown fully jumbled with a Hint button.
hinted: Phrase is still shown jumbled but word boundaries are
shown and category is also shown. Button shows Solve.
solved: Phrase is shown unjumbled with category. No button.
CSS needs work.