fix back button

Make it immune to the "do not hover if options visible" hack.
Make the states render it, not the options menu.

src/itdelatrisu/opsu/states/Game.java

@@ -717,6 +717,9 @@ public class Game extends ComplexOpsuState {
 
 		if (OPTION_DANCE_ENABLE_SB.state) {
 			optionsOverlay.render(g);
+			if (optionsOverlay.isActive()) {
+				backButton.draw(g);
+			}
 		}
 
 		UI.draw(g);
@@ -728,6 +731,9 @@ public class Game extends ComplexOpsuState {
 		
 		if (OPTION_DANCE_ENABLE_SB.state) {
 			optionsOverlay.preRenderUpdate();
+			if (optionsOverlay.isActive()) {
+				backButton.hoverUpdate();
+			}
 		}
 
 		int delta = renderDelta;