Minor addition to source.tooltip_top_offset setting

src/tooltips.cpp

@@ -243,8 +243,8 @@ void Tooltip::show(bool disregard_drawn, const std::function<void()> &on_motion)
           root_x -= 3; // -1xpadding
           rectangle.set_x(root_x);
           rectangle.set_y(root_y - size.second);
-          if(rectangle.get_y() < 0)
+          if(rectangle.get_y() < Config::get().source.tooltip_top_offset)
-            rectangle.set_y(0);
+            rectangle.set_y(Config::get().source.tooltip_top_offset);
         }
       }
       window->move(rectangle.get_x(), rectangle.get_y());