✅ Fix ThemeHandlerTest

Regression introduced by f718b26b : the test expected SCSS file was modified in sync with modifications done in iTop SCSS files. No need to do that as this file is only used in this test.

test/application/theme-handler/expected/css/light-grey.scss

@@ -1093,6 +1093,7 @@ input.dp-applied {
 				border-radius: $search-criteria-box-radius;
 				box-shadow: $box-shadow-regular;
 			}
+			.sfc_form_group,
 			.sfm_content{
 				position: absolute;
 				z-index: -1;