Limited Staff should not have studio read access by design. However, since many LMS views depend on the `has_course_author_access` check and `course_author_access_required` decorator, we have to allow write access until the permissions become more granular. For example, there should be STUDIO_VIEW_COHORTS and STUDIO_EDIT_COHORTS specifically for the cohorts endpoint, which is used to display "Cohorts" instructor dashboard tab.
common ------ This directory contains common code shared between LMS and CMS, such as Mako templates, CSS, and Coffescript.