EXT-8246 FIXED Disabling an adding of items into Recent People list in case of...

EXT-8246 FIXED Disabling an adding of items into Recent People list in case of incoming ad-hoc chat.

REASON: it was implemented in EXT-5694 to add all ad-hoc participants when user send a message to session created himself.
Participants IDs are known in this case.

But in case of incoming ad-hoc chat those IDs are not known. Container used to get IDs contains only Ad-hoc Session ID.
So, (???) is expected in this case in Recent People Panel.

FIX: disabling adding of items into Recent People list in case of incoming ad-hoc chat.

Note: participants will be added to the list once they send a message to chat.

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/724/

--HG--
branch : product-engine