reconcile boot and admin pages further

This adds some remaining parts of the boot page to
the admin panel, and then removes the boot page.

buildtools/webpack.config.js

@@ -14,7 +14,6 @@ module.exports = {
     main: "app/client/app",
     errorPages: "app/client/errorMain",
     apiconsole: "app/client/apiconsole",
-    boot: "app/client/boot",
     billing: "app/client/billingMain",
     form: "app/client/formMain",
     // Include client test harness if it is present (it won't be in