Fix "illegal focus flash message" from showing on delete
Fix "illegal focus flash message" from showing on delete

fixes COMMS-1003

test plan
* Turn on sections specific
* Make sure this is for discussions and announcements
* Make a bunch of discussions and announcements
* Play around with duplicating and deleting focus
* Make sure deleting the first element in a discussion
container shows no flash banner errors
* not a horrible ticket to qa hopefully

Change-Id: Id183b0867964393c300ec5eba842289961d84b7d
Reviewed-on: https://gerrit.instructure.com/145021
Reviewed-by: Landon Gilbert-Bland <60d9ff23682c863d36b48b4c32c5ce5f434d29c0@instructure.com>
Reviewed-by: Venk Natarajan <f9eab59b292314637a3c917fea4742741e36a19b@instructure.com>
Tested-by: Jenkins
QA-Review: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>
Product-Review: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>

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