Latif's requested touch-ups for IM windows in concise mode.

Profile option for concise flyout.
Fix for ding in multi-user chats breaking button alignment.

indra/newview/llimpanel.cpp

@@ -969,7 +969,7 @@ void copy_profile_uri(const LLUUID& id, bool group = false);
 
 void LLFloaterIMPanel::onFlyoutCommit(LLComboBox* flyout, const LLSD& value)
 {
-	if (value.isUndefined())
+	if (value.isUndefined() || value == LLSD(0))
 	{
 		LLAvatarActions::showProfile(mOtherParticipantUUID);
 		return;