fix shop option cursor indexing (#4601)

Co-authored-by: ImperialSympathizer <imperialsympathizer@gmail.com>

src/ui/modifier-select-ui-handler.ts

@@ -577,6 +577,10 @@ export default class ModifierSelectUiHandler extends AwaitableUiHandler {
     this.getUi().clearText();
     this.eraseCursor();
 
+    // Reset cursor positions
+    this.cursor = 0;
+    this.rowCursor = 0;
+
     /* Multiplies the fade time duration by the speed parameter so that it is always constant, and avoids "flashbangs" at game speed x5 */
     this.scene.hideShopOverlay(750 * this.scene.gameSpeed);
     this.scene.hideLuckText(250);