Merge pull request #1911 from ssushma/dev-branch

Reverted widget changes
"Added the assignments presenter "
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch
Merge pull request #1917 from suryanarayanakb/dev-branch

Added the assignments presenter
"handling the unit navigation"
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch
Merge pull request #1933 from suryanarayanakb/dev-branch

Handling the unit navigation
Personalize button disabled for student view