test(simple-combo): fix simple combo default max height

Author: didimmova

projects/igniteui-angular/src/lib/simple-combo/simple-combo.component.spec.ts

@@ -39,7 +39,7 @@ const CSS_CLASS_FOOTER = 'footer-class';
 const CSS_CLASS_INPUT_GROUP_REQUIRED = 'igx-input-group--required';
 const CSS_CLASS_INPUT_GROUP_INVALID = 'igx-input-group--invalid';
 const defaultDropdownItemHeight = 40;
-const defaultDropdownItemMaxHeight = 400;
+const defaultDropdownItemMaxHeight = 240;
 
 describe('IgxSimpleCombo', () => {
     let fixture: ComponentFixture<any>;