Security update for rails-html-sanitizer

"There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby. The gem allows non-whitelisted attributes to be present in sanitized output when input with specially-crafted HTML fragments, and these attributes can lead to an XSS attack on target applications. This issue is similar to CVE-2018-8048 in Loofah. All users running an affected release should either upgrade or use one of the workarounds immediately."

See https://cve.circl.lu/cve/CVE-2018-3741 and https://github.com/flavorjones/loofah/issues/144

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information