Added User-Agent in all Gooru API's Request Header
Null pointer exception has been handled.
My collections: made invisible default advanced text if all advanced options made open.
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Players: In reactions tool tip message removed special symbol.
Merge pull request #2399 from anilgooru/release-6.6.3.a1

Fixed : (IE) - In +New Resource the upload URL button and refresh icons are messed up.
Merge pull request #2398 from VinRudramurthy/release-6.6.3.a1

My collections: made invisible default advanced text if all advanced options made open.
Merge pull request #2400 from shivalinga/release-6.6.3.a1

Added User-Agent in all Gooru API's Request Header