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/tests/components/admin_console/request_button/__snapshots__/request_button.test.jsx.snap

@@ -2,7 +2,7 @@
 
 exports[`components/admin_console/request_button/request_button.jsx should match snapshot 1`] = `
 <div
-  className="form-group reload-config"
+  className="form-group"
 >
   <div
     className="col-sm-offset-4 col-sm-8"
@@ -93,7 +93,7 @@ exports[`components/admin_console/request_button/request_button.jsx should match
   }
 >
   <div
-    className="form-group reload-config"
+    className="form-group"
   >
     <div
       className="col-sm-offset-4 col-sm-8"
@@ -215,7 +215,7 @@ exports[`components/admin_console/request_button/request_button.jsx should match
   }
 >
   <div
-    className="form-group reload-config"
+    className="form-group"
   >
     <div
       className="col-sm-offset-4 col-sm-8"
@@ -337,7 +337,7 @@ exports[`components/admin_console/request_button/request_button.jsx should match
   }
 >
   <div
-    className="form-group reload-config"
+    className="form-group"
   >
     <div
       className="col-sm-offset-4 col-sm-8"
@@ -455,7 +455,7 @@ exports[`components/admin_console/request_button/request_button.jsx should match
   }
 >
   <div
-    className="form-group reload-config"
+    className="form-group"
   >
     <div
       className="col-sm-offset-4 col-sm-8"