"adding the title in the ui.xml"
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1
Merge pull request #2396 from suryanarayanakb/release-6.6.3.a1

Adding the title in the ui.xml
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
Changes for Search filters for pre-selecting rating OER and Mobile Friendly filter.
Players: In reactions tool tip message removed special symbol.
Fixed : (IE) - In +New Resource the upload URL button and refresh icons are messed up.
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1

* upstream/release-6.6.3.a1:
  "adding the title in the ui.xml"
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
Course tooltip stuck issue resolved and partially done resource text issue fixed
Merge branch 'release-6.6.3.a1' of https://github.com/Gooru/Gooru-Web into release-6.6.3.a1
Merge pull request #2401 from skumarreddysingiri/1.2+Responsive-Ui

Player - In mobile device the response popup for OE is cut off is fixed
"Changing the url value ,it should be {collectionid}.json"
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1
Prefilter popup scroll issue on firefox resolved