Fix position of RSS on mobile

src/invidious/views/subscriptions.ecr

@@ -2,14 +2,13 @@
 <title>Subscriptions - Invidious</title>
 <% end %>
 
-<div class="pure-g">
-    <div class="pure-u-1 pure-u-md-3-5">
+<div class="pure-g" style="padding:1em;">
+    <div class="pure-u-2-3">
         <h3>
             <a href="/subscription_manager">Manage subscriptions</a>
         </h3>
     </div>
-    <div class="pure-u-1 pure-u-md-1-5"></div>
-    <div style="text-align:right;" class="pure-u-1 pure-u-md-1-5">
+    <div class="pure-u-1-3" style="text-align:right;">
         <h3>
             <a href="/feed/private?token=<%= user.token %>"><i class="fas fa-rss-square"></i></a>
         </h3>