selected item adder: fix pop-up title when adding items to the current playlist

src/sel_items_adder.cpp

@@ -69,7 +69,7 @@ SelectedItemsAdder::SelectedItemsAdder()
 		MainStartY+(MainHeight-m_position_selector_height)/2,
 		m_position_selector_width,
 		m_position_selector_height,
-		"Scroll?",
+		"Where?",
 		Config.main_color,
 		Config.window_border
 	);