Encapsulate LFIDBearer::sActive, set with member setActive

This function caches the current type when active,
in the future it could be more useful than that.

sActive is now const, getActive returns const,
IDBearers display information, the interface should only be used for that

indra/newview/llfolderview.cpp

@@ -1340,18 +1340,15 @@ void LLFolderView::copy() const
 	S32 count = mSelectedItems.size();
 	if(getVisible() && getEnabled() && (count > 0))
 	{
-		LLFolderViewEventListener* listener = NULL;
-		selected_items_t::iterator item_it;
-		for (item_it = mSelectedItems.begin(); item_it != mSelectedItems.end(); ++item_it)
+		for (auto item : mSelectedItems)
 		{
-			listener = (*item_it)->getListener();
-			if(listener)
+			if(auto listener = item->getListener())
 			{
 				listener->copyToClipboard();
 			}
 		}
 	}
-	mSearchString.clear();
+	//mSearchString.clear(); // Singu Note: There's no good reason to clear out the jumpto item search string now, it'll time out anyway, let's remain const
 }
 
 BOOL LLFolderView::canCut() const