add fallback to last page

src/Umbraco.Web.UI.Client/src/shared/utils/pagination-manager/pagination.manager.test.ts

@@ -98,6 +98,13 @@ describe('UmbContextConsumer', () => {
       manager.setTotalItems(100);
       expect(manager.getTotalPages()).to.equal(20);
     });
+
+    it('it fall backs to the last page number if the totalPages is less than the currentPage', () => {
+      manager.setPageSize(5);
+      manager.setTotalItems(10);
+      manager.setCurrentPageNumber(5);
+      expect(manager.getCurrentPageNumber()).to.equal(2);
+    });
   });
 
   describe('Current Page', () => {

src/Umbraco.Web.UI.Client/src/shared/utils/pagination-manager/pagination.manager.ts

@@ -101,6 +101,12 @@ export class UmbPaginationManager extends EventTarget {
   #calculateTotalPages() {
     const totalPages = Math.ceil(this.#totalItems.getValue() / this.#pageSize.getValue());
     this.#totalPages.next(totalPages);
+
+    /* If we currently are on a page higher than the total pages. We need to reset the current page to the last page.
+    This can happen if we have a filter that returns less items than the current page size. */
+    if (this.getCurrentPageNumber() > totalPages) {
+      this.setCurrentPageNumber(totalPages);
+    }
   }
   
   #calculateSkip() {