changed from visible to visibility (css)
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1

* upstream/release-6.6.3.a1:
  Library: Issue rectified with quiz tab visibility.
  Library: Changed the banner image for ESYP and CCST library.
  Library:Increased partner lib container height.
  Library:Implemented CCST library.
  Library: Implemented ESYP Library.
Remove beta for FE and change fav icon.
Merge pull request #1628 from anilgooru/release-6.6.3.a1

Remove beta for FE and change fav icon.