Add Security Warning Bar for untrusted notebooks (#970)

* Add Security Warning Bar for untrusted notebooks

* Update

* Another update

* Add a snapshot test

* UX updates

* More updates

* Add tests

* Update test snapshot

* Update string

* Update security message

src/Explorer/Notebook/NotebookRenderer/PromptContent.test.tsx

@@ -0,0 +1,27 @@
+import { shallow } from "enzyme";
+import { PassedPromptProps } from "./Prompt";
+import { promptContent } from "./PromptContent";
+
+describe("PromptContent", () => {
+  it("renders for busy status", () => {
+    const props: PassedPromptProps = {
+      id: "id",
+      contentRef: "contentRef",
+      status: "busy",
+    };
+    const wrapper = shallow(promptContent(props));
+
+    expect(wrapper).toMatchSnapshot();
+  });
+
+  it("renders when hovered", () => {
+    const props: PassedPromptProps = {
+      id: "id",
+      contentRef: "contentRef",
+      isHovered: true,
+    };
+    const wrapper = shallow(promptContent(props));
+
+    expect(wrapper).toMatchSnapshot();
+  });
+});