Added comments.
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1

* upstream/release-6.6.3.a1:
Filters enabled on search page after checkbox selection for category and grades
"Advanced Options changes updated in edit resource,file upload,edit file upload popups"
"Advanced options updated for edit resource popup"
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1
Conflicts resolved for message properties file
Merge pull request #2327 from ssushma/release-6.6.3.a1

Filters enabled on search page after checkbox selection for category and...
Merge pull request #2328 from sravanthi1/release-6.6.3.a1

"Advanced options updated for edit resource popup,file upload and edit file upload popups"
Merge pull request #2329 from VinRudramurthy/release-6.6.3.a1

Search Pre-Filters: Issue rectified with subjects and grades check box selection.
Implemented comments data logging
Merge pull request #2330 from shivalinga/release-6.6.3.a1

Implemented comments data logging
UI Changes implemented for search filters
"Added the loding image and collection progress scroll move with navigation buttons"
Merge pull request #2331 from ssushma/release-6.6.3.a1

UI Changes implemented for search filters
Merge pull request #2332 from suryanarayanakb/release-6.6.3.a1

"Added the loding image and collection progress scroll move with navigate"
"added the left and right images"
Merge remote-tracking branch 'upstream/release-6.6.3.a1' into release-6.6.3.a1
Merge pull request #2333 from suryanarayanakb/release-6.6.3.a1

"Added images"