Fixed normal priority bug EXT-2002 ([BSI] Side Tray opened on it's own when...

Fixed normal priority bug EXT-2002 ([BSI] Side Tray opened on it's own when receiving group notice).
The check for group info panel visisbility was wrong (returned true even if a parent was invisible).

--HG--
branch : product-engine

indra/newview/llgroupactions.cpp

@@ -197,12 +197,12 @@ void LLGroupActions::activate(const LLUUID& group_id)
 	gAgent.sendReliableMessage();
 }
 
-bool	isGroupUIVisible()
+static bool isGroupUIVisible()
 {
 	LLPanel* panel = LLSideTray::getInstance()->findChild<LLPanel>("panel_group_info_sidetray");
 	if(!panel)
 		return false;
-	return panel->getVisible();
+	return panel->isInVisibleChain();
 }
 
 // static