Revert "Remove hidden label from Slack"
Revert "Remove hidden label from Slack"

This reverts commit 6f9036c9f182e40eeff512130784d78f93cac9a1.

fixes COMMS-2491

flag = none

Change-Id: I69628957a910df9a5615925e817a04ba2b177a3e
Reviewed-on: https://gerrit.instructure.com/213022
Tested-by: Jenkins
Reviewed-by: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>
QA-Review: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>
Product-Review: Landon Gilbert-Bland <60d9ff23682c863d36b48b4c32c5ce5f434d29c0@instructure.com>

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