Add responsive panels to the single-column layout (#10820)

* Add responsive panels to the single-column layout

* Fixes

* Fix not being able to save the preference

* Fix code style issues

* Set max-height on the compose textarea and add a link to relationship manager

app/javascript/mastodon/features/search/index.js

@@ -0,0 +1,17 @@
+import React from 'react';
+import SearchContainer from 'mastodon/features/compose/containers/search_container';
+import SearchResultsContainer from 'mastodon/features/compose/containers/search_results_container';
+
+const Search = () => (
+  <div className='column search-page'>
+    <SearchContainer />
+
+    <div className='drawer__pager'>
+      <div className='drawer__inner darker'>
+        <SearchResultsContainer />
+      </div>
+    </div>
+  </div>
+);
+
+export default Search;