Merge pull request #621 from anilgooru/dev-branch

Fixed null pointer exception.
Changes for the drop menu new sort option implemented in Teach mode.
Merge pull request #622 from ssushma/dev-branch

Changes for the drop menu new sort option implemented in Teach mode.
New UI Changes for No Assignments page Implemented.
Merge pull request #624 from ssushma/dev-branch

New UI Changes for No Assignments page Implemented.
Header seperation div added and drop menu changes implemented
Removed unnecessary messaging
Merge pull request #626 from ssushma/dev-branch

Creating class not working issue resolved
Opacity issue resolved for classpage Home page
Merge pull request #628 from ssushma/dev-branch

Opacity issue resolved for classpage Home page
Changed the static text for assign collection pop up in class page.
Merge pull request #629 from VinRudramurthy/dev-branch

Changed the static text for assign collection pop up in class page.
Changed the condition for blocked user to "0" for google sign in.
Merge branch 'dev-branch' of https://github.com/Gooru/Gooru-Web into dev-branch
" Modified sorting option correct duedate id "
Merge branch 'dev-branch' of https://github.com/Gooru/Gooru-Web into dev-branch
"UI Changes Updated for Suggested resources in Add Resource Popup."
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch
Merge pull request #630 from VinRudramurthy/dev-branch

Changed the condition for blocked user to "0" for google sign in.
Merge pull request #631 from mitraj/dev-branch

Modified sorting option correct due date id