EXT-3929: Also look in accordion tabs for help topic.

When the user clicks on the help "?" button, we try to find the
currently active tab and see if there is a help topic for that tab.
In addition, we now also look for a currently-visible accordion tab.

indra/llui/llpanel.cpp

@@ -43,6 +43,7 @@
 #include "llerror.h"
 #include "lltimer.h"
 
+#include "llaccordionctrltab.h"
 #include "llbutton.h"
 #include "llmenugl.h"
 //#include "llstatusbar.h"
@@ -851,14 +852,26 @@ static LLPanel *childGetVisibleTabWithHelp(LLView *parent)
 	// look through immediate children first for an active tab with help
 	for (child = parent->getFirstChild(); child; child = parent->findNextSibling(child))
 	{
+		LLPanel *curTabPanel = NULL;
+
+		// do we have a tab container?
 		LLTabContainer *tab = dynamic_cast<LLTabContainer *>(child);
 		if (tab && tab->getVisible())
 		{
-			LLPanel *curTabPanel = tab->getCurrentPanel();
-			if (curTabPanel && !curTabPanel->getHelpTopic().empty())
-			{
-				return curTabPanel;
-			}
+			curTabPanel = tab->getCurrentPanel();
+		}
+
+		// do we have an accordion tab?
+		LLAccordionCtrlTab* accordion = dynamic_cast<LLAccordionCtrlTab *>(child);
+		if (accordion && accordion->getDisplayChildren())
+		{
+			curTabPanel = dynamic_cast<LLPanel *>(accordion->getAccordionView());
+		}
+
+		// if we found a valid tab, does it have a help topic?
+		if (curTabPanel && !curTabPanel->getHelpTopic().empty())
+		{
+			return curTabPanel;
 		}
 	}