Refactor view files. Add option to disable sidebar.

src/_h5ai/public/js/lib/view/base.js

@@ -0,0 +1,36 @@
+const {jq} = require('../globals');
+
+const rootSelector = 'body';
+const tplTopbar =
+        `<div id="topbar">
+            <div id="toolbar"/>
+            <div id="flowbar"/>
+            <a id="backlink" href="https://larsjung.de/h5ai/" title="powered by h5ai - https://larsjung.de/h5ai/">
+                <div>powered</div>
+                <div>by h5ai</div>
+            </a>
+        </div>`;
+const tplMainrow =
+        `<div id="mainrow">
+            <div id="content"/>
+        </div>`;
+
+const init = () => {
+    jq('#fallback, #fallback-hints').remove();
+
+    const $root = jq(rootSelector)
+        .attr('id', 'root')
+        .append(tplTopbar)
+        .append(tplMainrow);
+
+    return {
+        $root,
+        $topbar: $root.find('#topbar'),
+        $toolbar: $root.find('#toolbar'),
+        $flowbar: $root.find('#flowbar'),
+        $mainrow: $root.find('#mainrow'),
+        $content: $root.find('#content')
+    };
+};
+
+module.exports = init();