Follow up to: bb31e7f5b6
This commit fixes this failing test:
`Assertion Failed: it should escape watched words`
Now that we have a handlebars template we can us it for escaping because
it does that for us.
This is another refactoring in the multi-step process to remove all uses
of our custom Render Buffer.
Previous commit: 2673cad142 in this
series.
This commit affects the display of watched words on the admin watched
word page. It is just a refactor and does not change any functionality.
