Fix element buttons missing from element search

Visible since c3cd4f1, which made element search scrollable.

The last row of buttons was only shown if it had exactly as many buttons as many fit.

src/gui/elementsearch/ElementSearchActivity.cpp

@@ -192,7 +192,11 @@ void ElementSearchActivity::searchTools(String query)
 		}
 	}
 
-	scrollPanel->InnerSize = ui::Point(scrollPanel->Size.X, current.Y + 1);
+	if (current.X == 0)
+	{
+		current.Y -= 19;
+	}
+	scrollPanel->InnerSize = ui::Point(scrollPanel->Size.X, current.Y + 20);
 }
 
 void ElementSearchActivity::SetActiveTool(int selectionState, Tool * tool)