Bug 1817600 - Show NordVPN partnership as text link and image. Extra template fixes. r=me

lib/sidebar.tmpl

@@ -68,10 +68,11 @@
    END;
 
    IF template.name == "index.en.html";
-     "<span style=\"font-size: x-small; text-align: center;\">\n";
-     "<a href=\"https://go.nordvpn.net/aff_c?offer_id=15&aff_id=81347&url_id=902\" target=\"_blank\">
+     "<div style=\"font-size: x-small; text-align: center;\">\n";
+     "<span><a href=\"https://go.nordvpn.net/aff_c?offer_id=15&aff_id=81347&url_id=902\" target=\"_blank\">
          Partnered with NordVPN</a></span><br>\n";
      "<a href=\"https://go.nordvpn.net/aff_c?offer_id=15&aff_id=81347&url_id=902\" target=\"_blank\">
-         <img src=\"/images/nordvpn-banner.png\" width=\"240\" height=\"240\"></a>";
+         <img src=\"/images/nordvpn-banner.png\" width=\"240\" height=\"240\"></a>\n";
+     "</div>";
    END;
 %]