TwoButtonModal: Close post install modal before quitting the game

Prevents the modal from continuing to show if shutting down the game
isn't instant

Author: DJtheRedstoner

src/main/java/gg/essential/ad/modal/TwoButtonModal.java

@@ -44,7 +44,10 @@ public static TwoButtonModal postInstall() {
         return new TwoButtonModal(
             "Essential Mod will install the next time\nyou launch the game.",
             (x, y, width) -> {
-                ModalButton button = new ModalButton(x, y, width, ButtonColor.GRAY, "Quit & Install", EssentialUtil::shutdown);
+                ModalButton button = new ModalButton(x, y, width, ButtonColor.GRAY, "Quit & Install", () -> {
+                    ModalManager.INSTANCE.setModal(null);
+                    EssentialUtil.shutdown();
+                });
                 button.setTooltip("This will close your game!");
                 return button;
             },