Improve the series navigation links

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

assets/scss/style.scss

@@ -333,6 +333,7 @@ figure {
 #SeriesNavigation {
     margin-top: 1em;
     display: flex;
+    flex-wrap: wrap;
 
     .wrapper {
       flex-grow: 1;
@@ -354,6 +355,7 @@ figure {
         font-size: 1.1em;
         display: flex;
         align-items: center;
+        margin-top: 1em;
 
         .feather {
           height: 1.25em;

layouts/partials/serieslink.html

@@ -4,7 +4,7 @@
     <div class="title-subtitle">
       {{ title .direction }} in Series
       {{ $divider := .term.Params.divider }}
-      {{ if $divider }}
+      {{ if (and $divider (strings.Contains .page.Title $divider)) }}
       {{ $rest := after 1 (split .page.Title $divider) }}
       <div class="title">{{ delimit $rest $divider }}</div>
       {{ else }}