[3437] Fixed Cypress test

Bug: #3437
Signed-off-by: Denis Nikiforov <denis.nikif@gmail.com>

CHANGELOG.adoc

@@ -61,6 +61,7 @@ Its single method, `getTargetObjectId`, has been moved up into the main `IRepres
 For representations which were *not* `ISemanticRepresentation` before, their target object is the `IEditingContext` itself if nothing more relevant is available.
 Accordingly, `IObjectSearchService` and `IIdentityService` now handle actual `IEditingContext` instances as objects.
 - https://github.com/eclipse-sirius/sirius-web/issues/3425[#3425] [diagram] In our GraphQL schema, `DiagramDescription` must now declare an `ArrangeLayoutDirection`.
+- https://github.com/eclipse-sirius/sirius-web/issues/3437[#3437] [core] Migrate frontend to MUI 5
 
 === Dependency update
 

integration-tests/cypress/e2e/project/diagrams/group-palette.cy.ts

@@ -180,7 +180,7 @@ describe('Diagram - group palette', () => {
         explorer.select('attribute');
         explorer.select('package', true);
         diagram.fitToScreen();
-        diagram.getNodes('diagram', 'package').click('top');
+        diagram.getNodes('diagram', 'attribute').click();
         diagram.getGroupPalette().should('exist');
         diagram.getGroupPalette().findByTestId('Align left').should('not.exist');
       });

packages/diagrams/frontend/sirius-components-diagrams/src/renderer/palette/group-tool/GroupPalette.tsx

@@ -314,7 +314,6 @@ export const GroupPalette = memo(({ x, y, isOpened, refElementId, hidePalette }:
             open={state.isDistributeElementToolSectionExpand}
             anchorEl={anchorRef.current}
             placement="bottom-start"
-            transition
             disablePortal
             style={{ zIndex: 9999 }}>
             <Paper className={classes.toolList} elevation={2}>