fixing comma issue with free shipping coupon
removed url decode from custom text attributes related to commit 7bce58e
Merge pull request #5172 from BFTrick/free-ship-coupon

An Extra Comma Appears When Using A Coupon That Gives Free Shipping
Merge pull request #5173 from splashingpixels/encoding

removed url decode from custom text attributes related to commit 7bce58e
Remove this from earlier as it breaks foreign chars
URL decode attributes in admin so they display correctly (asian chars)