Hide header search bar when default_home is empty

src/invidious/views/template.ecr

@@ -28,6 +28,7 @@
         <div class="pure-u-1 pure-u-md-2-24"></div>
         <div class="pure-u-1 pure-u-md-20-24">
             <div class="pure-g navbar h-box">
+                <% if !env.get("preferences").as(Preferences).default_home.empty? %>
                     <div class="pure-u-1 pure-u-md-4-24">
                         <a href="/" class="index-link pure-menu-heading">Invidious</a>
                     </div>
@@ -38,6 +39,8 @@
                             </fieldset>
                         </form>
                     </div>
+                <% end %>
+
                 <div class="pure-u-1 pure-u-md-8-24 user-field">
                     <% if env.get? "user" %>
                         <div class="pure-u-1-4">