Upgrade asset dependencies
patternfly-sass and jquery-ui-rails are bit old now and deserves an upgrading.
Refs #28320 - Allow sass-rails 5.x again
This partially reverts 26dda8dbbf32d357657c3d22018c9d247fb0cb4e. The
reason is that the sassc RPM packaging was broken. However, there's
nothing (yet) that really needs it. This allows testing with the newer
version wil allowing the older one as well.