Rename index.tsx to {class name}.tsx (#689)

* Rename index.tsx to {class name}.tsx

* Update tests

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

src/Common/Tooltip/Tooltip.tsx

@@ -0,0 +1,24 @@
+import { useId } from "@uifabric/react-hooks";
+import { ITooltipHostStyles, TooltipHost } from "office-ui-fabric-react/lib/Tooltip";
+import * as React from "react";
+import InfoBubble from "../../../images/info-bubble.svg";
+
+const calloutProps = { gapSpace: 0 };
+const hostStyles: Partial<ITooltipHostStyles> = { root: { display: "inline-block" } };
+
+export interface TooltipProps {
+  children: string;
+}
+export const Tooltip: React.FunctionComponent = ({ children }: TooltipProps) => {
+  const tooltipId = useId("tooltip");
+
+  return children ? (
+    <span>
+      <TooltipHost content={children} id={tooltipId} calloutProps={calloutProps} styles={hostStyles}>
+        <img className="infoImg" src={InfoBubble} alt="More information" />
+      </TooltipHost>
+    </span>
+  ) : (
+    <></>
+  );
+};