Fix logo relative link

i18n/contents.pot

@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-11-26 16:50+CET\n"
+"POT-Creation-Date: 2018-11-26 16:52+CET\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: en <LL@li.org>\n"

templates/navbar.html

 <div class="container bg-dark">
   <nav class="navbar no-background navbar-expand-lg navbar-dark fixed-top bg-dark p-5">
     <a class="navbar-brand" href="/">
-      <img src="{{ '/static/images/tor-logo.svg' }}" >
+      <img src="{{ '/static/images/tor-logo.svg'|asseturl }}" >
       <span class="sr-only">{{ _("Tor Logo") }}</span>
     </a>
     <label for="nav-toggle">