Web: Channels not updated for other users until refresh

Description

This is a regression introduced when fixing since there is a dispatch missing in the websocket handling.

Repro steps:
1) Have two users viewing the same channel
2) Rename the channel or change the channel header as the first user

Observed: The second user doesn't see the updated channel name or header
Expected: The second user sees the updated channel name or header

QA Test Steps

See description

Status

Mana

None

Assignee

Harrison Healey

Reporter

Harrison Healey

Epic Link

None

Fix versions

Mattermost Team

Apps

Sprint

None

Labels

None

GitHub Issue

None

QA Assignee

Steve Mudie

QA Testing Areas

Channel Settings