fix #19: add option to keep external sites in the top menu

templates/settings/admin-form.php

@@ -248,6 +248,23 @@ $choicesSizes = [
                 <?php endforeach; ?>
             </select>
         </div>
+
+        <div>
+            <label for="side-menu-external-sites-in-top-menu" class="settings-hint">
+                <?php p($l->t('Do not move external sites in the side menu')); ?>
+                <small><span class="warning">Experimental</span></small>
+            </label>
+        </div>
+
+        <div>
+            <select id="side-menu-external-sites-in-top-menu" name="external-sites-in-top-menu">
+                <?php foreach ($choicesYesNo as $label => $value): ?>
+                    <option value="<?php echo $value ?>" <?php if ($value === $_['external-sites-in-top-menu']): ?>selected<?php endif; ?>>
+                        <?php echo $l->t($label);  ?>
+                    </option>
+                <?php endforeach; ?>
+            </select>
+        </div>
     </div>
 
     <div class="section">