Fix media comments on conversations
Fix media comments on conversations

Test Plan
  - Go to the conversations page
  - Compose a new message
  - Notice that the media upload button is displayed, and you can click
    it to upload/record media

fixes COMMS-2487

flag = none

Change-Id: I03331f8770228580e8a82ab74b05b6f9956d6900
Reviewed-on: https://gerrit.instructure.com/212589
Tested-by: Jenkins
Product-Review: Landon Gilbert-Bland <60d9ff23682c863d36b48b4c32c5ce5f434d29c0@instructure.com>
Reviewed-by: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>
QA-Review: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>

djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms