Cleanups.

- Show the "Server Add needs configuration" message whenever
  there are no paths.

- Un-ajaxify the admin code to remove complexity and allow us to
  update the status message as appropriate.

- Rename server_add_admin.html.php to admin_server_add.html.php
  for consistency.

- Fix up form to properly display error messages

- Get rid of server_add_dir_list.html.php now that we're
  non-ajaxified.

- Change delete <span> to an <a> for non-ajax world.

modules/server_add/views/admin_server_add.html.php

@@ -0,0 +1,25 @@
+<?php defined("SYSPATH") or die("No direct script access.") ?>
+<div id="gServerAddAdmin">
+  <h2>
+    <?= t("Add From Server Admininstration") ?>
+  </h2>
+  <div id="gAuthorizedPath">
+    <span><?= t("Authorized Paths") ?></span>
+    <ul id="gPathList">
+      <? foreach ($paths as $id => $path): ?>
+      <li class="ui-icon-left">
+        <a href="<?= url::site("admin/server_add/remove_path?path=$path&csrf=" . access::csrf_token()) ?>"
+           id="icon_<?= $id?>"
+           class="gRemoveDir ui-icon ui-icon-trash">
+          X
+        </a>
+        <?= $path ?>
+      </li>
+      <? endforeach ?>
+    </ul>
+    <div id="gNoAuthorizedPaths" <? if (!empty($paths)): ?>style="display:none"<? endif ?>>
+      <span class="gWarning"><?= t("No Authorized image source paths defined") ?></span>
+    </div>
+  </div>
+  <?= $form ?>
+</div>