Merge pull request #97 from anilgooru/release-6.2

Fixed issue with not loading default image in Firefox.
6.2 QA [Organize - Folder Metadata] when Metadata box is in a collapsed position, click on Edit Folder Metadata, box is messed up - Resolved
Folder metadata edit profanity checker implemented
Character limit validations added for folder metadata fields.
UI issue in the Resource player for category icon placement resolved.
Teacher tip and language objective fields, character limit issue resolved.
6.2 [Study] Provide messaging for users who land on a class after entering a class code. - Handled for Open class scenario
6.2 [Study] Provide messaging for users who land on a class after entering a class code. - Handled for Open class scenario
6.2 [Study] Provide messaging for users who land on a class after entering a class code. - Handled for Open class scenario
Merge pull request #98 from ssushma/release-6.2

6.2 QA [Organize - Folder Metadata] when Metadata box is in a collapsed ...
6.2 [Study] Provide messaging for users who land on a class after entering a class code. - Handled for Open class scenario
Merge pull request #99 from ssushma/release-6.2

6.2 [Study] Provide messaging for users who land on a class after enteri...
reverted code for OER filter
Merge pull request #101 from nutan-gooru/release-6.2

reverted code for OER filter
Privacy Policy some text updates
Merge remote-tracking branch 'upstream/release-6.2' into release-6.2
Merge pull request #102 from mitraj/release-6.2

Privacy Policy some text updates
Multiple answer data log:
Session tracking API implemented for
Multiple answer question types
Merge branch 'release-6.2' of https://github.com/Gooru/Gooru-Web into release-6.1.5
Teachable Moments Course meta data updated for the content display in RUSD library