feat(preferences): extension modals into extension panes (#683)

* feat(preferences): show inline extensions in extensions pane

* wip

* wip

* refactor: convert ComponentView to React component

* refactor: convert ComponentView to React component

* chore: fix merge conflicts

* feat: don't show features whose `area` is "room", update modal items' icons in Preferences menu

* chore: fix TS error

* feat: don't show 2FA Manager in modal-based component

* feat: remove `ExtendedDataReloadComplete` event, since Extensions Manger is being removed from the app

* chore: avoid hardcoded values in svg image, optimize `if` condition

* chore: remove remnant comment

* fix: fix typescript errors

Co-authored-by: vardanhakobyan <vardan_live@live.com>

app/assets/javascripts/components/ComponentView/UrlMissing.tsx

@@ -0,0 +1,26 @@
+import { FunctionalComponent } from 'preact';
+
+interface IProps {
+  componentName: string;
+}
+
+export const UrlMissing: FunctionalComponent<IProps> = ({ componentName }) => {
+  return (
+    <div className={'sn-component'}>
+      <div className={'sk-panel static'}>
+        <div className={'sk-panel-content'}>
+          <div className={'sk-panel-section stretch'}>
+            <div className={'sk-panel-section-title'}>
+              This extension is not installed correctly.
+            </div>
+            <p>Please uninstall {componentName}, then re-install it.</p>
+            <p>
+              This issue can occur if you access Standard Notes using an older version of the app.{' '}
+              Ensure you are running at least version 2.1 on all platforms.
+            </p>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};