Revert "Using the correct variable for APP_URL_ROOT, now..."

This didn't work out the way I thought it would due to what django uses for the url of the i18n javascript.

This reverts commit 95de98898e7e9ffcc881b4aa3b8104d972f27b6b.
Revert "The jsi18n javascript is actually at wherever the project is mounted. (/, /admin, etc.)"

This reverts commit 321095d4211299a4898e826b9864d88476ae324e.