Unify offcanvas keydown event logic with modal (#38025)

js/src/modal.js

@@ -208,7 +208,6 @@ class Modal extends BaseComponent {
       }
 
       if (this._config.keyboard) {
-        event.preventDefault()
         this.hide()
         return
       }

js/src/offcanvas.js

@@ -198,12 +198,12 @@ class Offcanvas extends BaseComponent {
         return
       }
 
-      if (!this._config.keyboard) {
-        EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED)
+      if (this._config.keyboard) {
+        this.hide()
         return
       }
 
-      this.hide()
+      EventHandler.trigger(this._element, EVENT_HIDE_PREVENTED)
     })
   }