add userboxes and use them instead of flash

views/user/settings.etlua

@@ -1,8 +1,8 @@
 <% render("views.common.topnav") -%>
 <div class="darkbg settings-container">
   <h1>User settings</h1>
-  <% if flash_msg then %>
-    <h2><%= flash_msg %></h2>
+  <% if infobox then %>
+    <% render("views.common.infobox", infobox) %>
   <% end %>
   <form class="avatar-form" method="post" action="<%= url_for("user_set_avatar", {username = me.username}) %>" enctype="multipart/form-data">
     <img src="<%= avatar_url(me) %>">
@@ -10,7 +10,7 @@
     <div>
     <input type="submit" value="Update avatar">
   <% if not me:is_default_avatar() then %>
-    <input type="submit" value="Clear avatar" formaction="<%= url_for("user_clear_avatar", {username = me.username}) %>">
+    <input type="submit" value="Clear avatar" formaction="<%= url_for("user_clear_avatar", {username = me.username}) %>" formnovalidate>
   <% end %>
   </div>
   </form>