add markup to topics create

views/topics/create.etlua

@@ -1,6 +1,10 @@
-<h1>Create topic</h1>
-<form method="post">
-  <input type="text" name="name" id="name" placeholder="Topic name" required><br>
-  <textarea id="description" name="description" placeholder="Topic description" required></textarea><br>
-  <input type="submit" value="Create topic">
-</form>
+<div class="darkbg settings-container">
+  <h1>Create topic</h1>
+  <form method="post">
+    <label for=name>Name</label>
+    <input type="text" name="name" id="name" required><br>
+    <label for=description>Description</label>
+    <textarea id="description" name="description" required rows=5></textarea><br>
+    <input type="submit" value="Create topic">
+  </form>
+</div>