Fix prevented show event disables modals with fade class from being displayed again (#34085)

Fix modal, in case is faded, a prevented show event can cause show method to not  be executed again.

js/src/modal.js

@@ -108,20 +108,20 @@ class Modal extends BaseComponent {
       return
     }
 
-    if (this._isAnimated()) {
-      this._isTransitioning = true
-    }
-
     const showEvent = EventHandler.trigger(this._element, EVENT_SHOW, {
       relatedTarget
     })
 
-    if (this._isShown || showEvent.defaultPrevented) {
+    if (showEvent.defaultPrevented) {
       return
     }
 
     this._isShown = true
 
+    if (this._isAnimated()) {
+      this._isTransitioning = true
+    }
+
     scrollBarHide()
 
     document.body.classList.add(CLASS_NAME_OPEN)