Rename errorView() to indexingView()

Problem: Since the `errorView()` has a refresh we can probably just call
it `indexingView()` and add the indexing-specific code.

Solution:  Rename `errorView()` to `indexingView()` and add a progress
bar for it.

src/index.js

@@ -145,7 +145,7 @@ const {
   authorView,
   commentView,
   editProfileView,
-  errorView,
+  indexingView,
   extendedView,
   latestView,
   likesView,
@@ -776,9 +776,7 @@ const middleware = [
     const mebibyte = 1024 * 1024;
 
     if (left > mebibyte) {
-      ctx.response.body = errorView({
-        message: `Oasis has only processed ${percent}% of the messages and needs to catch up. This page will refresh every 10 seconds. Thanks for your patience! ❤`
-      });
+      ctx.response.body = indexingView({ percent });
     } else {
       await next();
     }

src/views/index.js

@@ -1030,20 +1030,13 @@ exports.hashtagView = ({ messages, hashtag }) => {
 };
 
 exports.indexingView = ({ percent }) => {
-  return template(
-    section(
-      p(
-        `Sorry, Oasis has only processed ${percent}% of the messages and needs to catch up. Thanks for your patience, please wait for a moment and refresh this page to try again.`
-      )
-    )
-  );
-};
+  // TODO: i18n
+  const message = `Oasis has only processed ${percent}% of the messages and needs to catch up. This page will refresh every 10 seconds. Thanks for your patience! ❤`;
 
-exports.errorView = ({ message }) => {
   const nodes = html(
     { lang: "en" },
     head(
-      title("Oasis -- Error"),
+      title("Oasis"),
       link({ rel: "icon", type: "image/svg+xml", href: "/assets/favicon.svg" }),
       meta({ charset: "utf-8" }),
       meta({
@@ -1056,7 +1049,13 @@ exports.errorView = ({ message }) => {
       }),
       meta({ "http-equiv": "refresh", content: 10 })
     ),
-    body(main({ id: "content" }, p(message)))
+    body(
+      main(
+        { id: "content" },
+        p(message),
+        progress({ value: percent, max: 100 })
+      )
+    )
   );
 
   const result = doctypeString + nodes.outerHTML;