overlay renderer: don't allow moving dynamic or tooltip overlays

Originally this was fixed in d02ddfc1b2 but then
broken in d676542dc2. Preferred positions don't
make sense for either overlay type and for tooltips breaks them due to having
them offset from the mouse position.

runelite-client/src/main/java/net/runelite/client/ui/overlay/OverlayRenderer.java

@@ -381,6 +381,12 @@ public class OverlayRenderer extends MouseAdapter implements KeyListener
 			{
 				for (Overlay overlay : overlayManager.getOverlays())
 				{
+					if (overlay.getPosition() == OverlayPosition.DYNAMIC || overlay.getPosition() == OverlayPosition.TOOLTIP)
+					{
+						// never allow moving dynamic or tooltip overlays
+						continue;
+					}
+
 					final Rectangle bounds = overlay.getBounds();
 					if (bounds.contains(mousePoint))
 					{