fix-9132: Dropdown list is hidden when passing the header table (#9136)

* fix-9132: Dropdown list is hidden when passing the header table

* fix-9132: Dropdown list is hidden when passing the header table

Author: Hieu Lam - TMA

app/components/side-bar.js

@@ -1,7 +1,7 @@
 import classic from 'ember-classic-decorator';
 import $ from 'jquery';
 import Component from '@ember/component';
-import { action, computed} from '@ember/object';
+import { action, computed } from '@ember/object';
 import { inject as service } from '@ember/service';
 import { tracked } from '@glimmer/tracking';
 @classic

app/styles/partials/utils.scss

@@ -281,3 +281,7 @@
     padding-bottom: 0 !important;
   }
 }
+
+.ember-table th {
+  z-index: 0 !important;
+}