PLT-6595 (Client): Elasticsearch indexing system console UI (#6991)

* PLT-6595: System Console for Elasticsearch Job Management.

* Fixing UI issues

* Fixing colors

* ESLint Fixes.

* Update test snapshots.

* Fixing cancel button

* Fix review comments.

* Config capitalisation.

* Review fixes.

webapp/sass/utils/_module.scss

@@ -3,3 +3,4 @@
 @import 'functions';
 @import 'mixins';
 @import 'animations';
+@import 'modifiers';