fix(nav): exclude nav from custom dialog (#25689)

resolves #25677, resolves #25688

Author: liamdebeasi

core/src/css/core.scss

@@ -170,7 +170,7 @@ html.ios ion-modal.modal-card .ion-page {
  * These changes allow certain dimension values
  * such as fit-content to work correctly.
  */
-ion-modal .ion-page {
+ion-modal .ion-page:not(ion-nav .ion-page) {
   position: relative;
 
   contain: layout style;