make Screenreader say the name of feed to delete
make Screenreader say the name of feed to delete

fixes COMMS-702

Test Plan
* enable sections specific
* turn on screenreader
* go to announcements page
* create some feeds
* focus to the delete feed x
* notice it says the title of feed

Change-Id: I8b8f37867e06d19413399b9d7059e4a04f956204
Reviewed-on: https://gerrit.instructure.com/138599
Reviewed-by: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>
Tested-by: Jenkins
Reviewed-by: Felix Milea-Ciobanu <9384aa226ac9d3237ed0bc52e18ffcb251ee0bf7@instructure.com>
QA-Review: Steven Burnett <a0b450117c5d20a22d5c4d52bb8ae13adee003d8@instructure.com>
Product-Review: Aaron Kc Hsu <089edc94045de3d9f5f372fb17706d21afcc259f@instructure.com>

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