MOBILE-4834 bootstrap: Add scroll to the whole modal if needed

Author: crazyserver

src/theme/components/ion-modal.scss

@@ -33,6 +33,8 @@ ion-modal {
     &.core-bootstrap-modal {
         --height: auto;
         --background: transparent;
+        --max-height: 100%;
+        --overflow: scroll;
     }
 
     &.modal-sheet::part(handle) {