[increment minor] Merge pull request #844 from Brightspace/Update_All_Courses_Filter_To_Use_Subtle_Button_Opener
[increment minor] Merge pull request #844 from Brightspace/Update_All_Courses_Filter_To_Use_Subtle_Button_Opener

Use subtle button opener for the filter in the All Courses overlay
Brightspace/d2l-my-courses-ui