Merge pull request #1046 from anilgooru/dev-branch

Implemented : Add OER Tag in search results
Implemented change Mobile Friendly Tag
call refersh event for workspace
Enabling window scroll on adding question fixed.
Merge pull request #1047 from nutan-gooru/dev-branch

Implemented change Mobile Friendly Tag
added new class for 500 error.
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

* upstream/dev-branch:
  call refersh event for workspace
  Implemented change Mobile Friendly Tag