Add SIS ID column to new Gradebook

Part of CANVAS-188
Enable filtering by SIS ID in new Gradebook

Related to CANVAS-188
New api calls, js methods and ui form for course search feature
Update course_form_controller.rb
Bug fixes/improvement after selecting a course from the search list & change error text
Merge branch 'manual-course-search-ui' of github.com:ronvs/canvas-lms into manual-course-search-ui
Merge pull request #59 from ronvs/manual-course-search-ui

Course search form feature
Merge pull request #58 from va7map/canvas188

CANVAS-188 Add student number column to the New Gradebook