Add feed link to watch history

src/invidious/views/history.ecr

@@ -3,9 +3,14 @@
 <% end %>
 
 <div class="pure-g h-box">
-    <div class="pure-u-2-3">
+    <div class="pure-u-1-3">
         <h3><%= translate(locale, "`x` videos", %(<span id="count">#{user.watched.size}</span>)) %></h3>
     </div>
+    <div class="pure-u-1-3" style="text-align:center;">
+        <h3>
+            <a href="/feed/subscriptions"><%= translate(locale, "`x` subscriptions", %(<span id="count">#{user.subscriptions.size}</span>)) %></a>
+        </h3>
+    </div>
     <div class="pure-u-1-3" style="text-align:right;">
         <h3>
             <a href="/clear_watch_history"><%= translate(locale, "Clear watch history") %></a>