* fix: TinyMCE editors in advanced block editors
* Sets baseUrl to avoid an error in: 86eee4b05d/xblock/utils/public/studio_edit.js (L52)
* Uncouple the listener func of the cancel button (see the comment)
* chore: Add `edx_sga` in `LIBRARY_ENABLED_BLOCKS`
common ------ This directory contains common code shared between LMS and CMS, such as Mako templates, CSS, and Coffescript.