only display the count for coupon redemptions that actually went through to purchase completion
Merge pull request #6330 from edx/cdodge/filter-unpurchased-coupons

[WL-186] only display the count for coupon redemptions that actually went through...
Improve i18n for courseware page
Better i18n for credit card charge failures
Revert "Better i18n for credit card charge failures"

This reverts commit 619a5ea3eb239fd561af0bbd30ed10af071e3d7d.
Merge pull request #6382 from edx/zoldak/fix-master

Revert "Better i18n for credit card charge failures"
Merge pull request #6379 from edx/improve-i18n-courseware-page

Improve i18n for courseware page

Merging from an airplane! w00t