Issue ED-868 CSS cleanup and themes cleanup & SASS migration#79

vinodkumar45 wants to merge 4 commits intoproject-sunbird:release-5.1.0project-sunbird/sunbird-player-sdk:release-5.1.0from

vinodkumar45:5.1.0vinodkumar45/sunbird-player-sdk:5.1.0Copy head branch name to clipboard