TS migration. #2288. (#2328)

* Added TS. Updated build and linting config. Added types.

* [ts-migrate][.] Rename files from JS/JSX to TS/TSX

Co-authored-by: ts-migrate <>

* [ts-migrate][.] Run TS Migrate

Co-authored-by: ts-migrate <>

* Corrected files mangled by ts-migrate.

* Updated lint config, minor linting.

* Re-enabled Husky.

* Updated tests and config.

* Reverted webpack devtool config.

* Removed obsolete snapshots.

* Added annotations snap.

* Updated tsconfig includes wrt linting.

* Removed ts-migrate.

Co-authored-by: Timmy Huang <tihuan@users.noreply.github.com>

client/src/components/brushableHistogram/loading.js

@@ -1,43 +0,0 @@
-import React from "react";
-import { Button } from "@blueprintjs/core";
-
-import * as globals from "../../globals";
-
-const StillLoading = ({ zebra, displayName }) => {
-  /*
-    Render a loading indicator for the field.
-    */
-  return (
-    <div
-      data-testclass="gene-loading-spinner"
-      style={{
-        padding: globals.leftSidebarSectionPadding,
-        backgroundColor: zebra ? globals.lightestGrey : "white",
-      }}
-    >
-      <div
-        style={{
-          display: "flex",
-          justifyContent: "space-between",
-          justifyItems: "center",
-          alignItems: "center",
-        }}
-      >
-        <div style={{ minWidth: 30 }} />
-        <div style={{ display: "flex", alignSelf: "center" }}>
-          <span style={{ fontStyle: "italic" }}>{displayName}</span>
-        </div>
-        <div
-          style={{
-            display: "flex",
-            justifyContent: "flex-end",
-          }}
-        >
-          <Button minimal loading intent="primary" />
-        </div>
-      </div>
-    </div>
-  );
-};
-
-export default StillLoading;