Revert "Stricter regex for dollars filter based on page location"

This reverts commit e02bb2efdbdb7f24fd540955c0db214cfec84294.
Revert "jshint again"

This reverts commit 2478f824da2ea879dbf540d1958a23be72bd6a01.
Revert "Brings back MSC/XPR in dollar filter; Use dollars for checkout pages; Fix max-width problem for issue comments html"

This reverts commit 563d6d7e61142b52a5ec4a3392cfb83843c53501.