Added index refresh to SQL API indexing policy editor (#306)

* Index refresh component introduced

- Made all notifications in Mongo Index editor have 12 font size
- Added indexing policy refresh to sql indexing policy editor
- Added "you have unsaved changes" message, replace old message for lazy indexing policy changes

* formatting changes

* addressed PR comments

src/Explorer/Controls/Settings/SettingsUtils.test.tsx

@@ -15,7 +15,8 @@ import {
   MongoWildcardPlaceHolder,
   getMongoIndexTypeText,
   SingleFieldText,
-  WildcardText
+  WildcardText,
+  isIndexTransforming
 } from "./SettingsUtils";
 import * as DataModels from "../../../Contracts/DataModels";
 import * as ViewModels from "../../../Contracts/ViewModels";
@@ -139,3 +140,10 @@ describe("SettingsUtils", () => {
     expect(notification.type).toEqual(MongoNotificationType.Error);
   });
 });
+
+it("isIndexingTransforming", () => {
+  expect(isIndexTransforming(undefined)).toBeFalsy();
+  expect(isIndexTransforming(0)).toBeTruthy();
+  expect(isIndexTransforming(90)).toBeTruthy();
+  expect(isIndexTransforming(100)).toBeFalsy();
+});