chore(ui5-multi-combobox): fix failing test (#12745)

Author: StefanDimitrov04

packages/main/cypress/specs/MultiComboBox.cy.tsx

@@ -641,15 +641,15 @@ describe("General", () => {
 			}));
 	});
 
-	it.skip("Select All functionality + N-more integration", () => {
+	it("Select All functionality + N-more integration", () => {
 		cy.mount(
 			<><MultiComboBox style="width: 100px" noValidation={true} showSelectAll={true}>
 				<MultiComboBoxItem selected={true} text="Very Very Very Very long Item 1"></MultiComboBoxItem>
 				<MultiComboBoxItem selected={true} text="Item 2"></MultiComboBoxItem>
 				<MultiComboBoxItem selected={true} text="Item 3"></MultiComboBoxItem>
 				<MultiComboBoxItem text="Item 4"></MultiComboBoxItem>
 				<MultiComboBoxItem text="Item 5"></MultiComboBoxItem>
-			</MultiComboBox><Button id="dummyButton"></Button></>
+			</MultiComboBox><Button>Dummy Button</Button></>
 		);
 
 		cy.get("[ui5-multi-combobox]")
@@ -676,15 +676,13 @@ describe("General", () => {
 			.find(".ui5-mcb-select-all-checkbox")
 			.should("not.have.attr", "checked");
 
-		cy.get("#dummyButton")
-			.realClick();
+		// focus the dummy button to close the popover
+		cy.realPress("Tab");
+		cy.realPress("Tab");
 
 		cy.get<ResponsivePopover>("@popover")
 			.ui5ResponsivePopoverClosed();
 
-		cy.get("[ui5-multi-combobox]")
-			.should("not.be.focused");
-
 		cy.get("[ui5-multi-combobox]")
 			.shadow()
 			.find("[ui5-tokenizer]")