Migrate Add Database Panel to React (#597)

Co-authored-by: Steve Faulkner <southpolesteve@gmail.com>

src/Explorer/Controls/ThroughputInput/CostEstimateText/CostEstimateText.test.tsx

@@ -0,0 +1,13 @@
+import { shallow } from "enzyme";
+import React from "react";
+import { CostEstimateText } from "./CostEstimateText";
+const props = {
+  requestUnits: 5,
+  isAutoscale: false,
+};
+describe("CostEstimateText Pane", () => {
+  it("should render Default properly", () => {
+    const wrapper = shallow(<CostEstimateText {...props} />);
+    expect(wrapper).toMatchSnapshot();
+  });
+});