Add option to Client Control plugin to disable Start a chat in Spark

Description

Some admins might want to disable this option in Spark, so their users won't be able to initiate chats with users not in groups they can see.

Environment

None

Acceptance Test - Entry

None
Fixed

Assignee

wroot

Reporter

wroot

Expected Effort

None

Ignite Forum URL

None

Components

Fix versions

Priority

Minor
Configure