test: add margin to context-menu to prevent mouseover

Author: web-padawan

packages/context-menu/test/items-theme.test.js

@@ -18,7 +18,7 @@ describe('items theme', () => {
 
   beforeEach(async () => {
     rootMenu = fixtureSync(`
-      <vaadin-context-menu theme="foo">
+      <vaadin-context-menu theme="foo" style="margin-top: 10px;">
         <button id="target"></button>
       </vaadin-context-menu>
     `);

packages/context-menu/test/items.test.js

@@ -32,7 +32,7 @@ describe('items', () => {
 
   beforeEach(async () => {
     rootMenu = fixtureSync(`
-      <vaadin-context-menu>
+      <vaadin-context-menu style="margin-top: 10px;">
         <button id="target"></button>
       </vaadin-context-menu>
     `);