add link to open feed-url (fixes #199) (#235)

* add link to open feed-url

* add link to feed url using <a> tag

* fix typo

templates/part.navigation.feed.php

@@ -148,6 +148,12 @@
                     <span><?php p($l->t('Ignore updated')); ?></span>
                 </button>
             </li>
+            <li>
+                <a ng-href="{{feed.url}}" target="_blank" rel="noopener noreferrer">
+                    <span class="icon-rss"></span>
+                    <span><?php p($l->t('Open feed url')); ?></span>
+                </a>
+            </li>
             <li>
                 <button ng-click="feed.editing=true">
                     <span class="icon-rename"></span>