Web: accessibilityLabel propType warning

Description

Repro steps:
1) Run Mattermost from the Makefile
2) Create a new channel or scroll up far enough to see the intro message

Observed: This warning is printed to the browser logs


Expected: No warnings are printed to the browser logs

QA Test Steps

see description

Status

Mana

None

Assignee

Elias Nahum

Reporter

Harrison Healey

Epic Link

None

Fix versions

Mattermost Team

Apps

Sprint

None

Labels

None

GitHub Issue

None

QA Testing Areas

Other (write in QA test steps)