Delete jump_to when is nothing to show (#33)

* create override file

* add override file

* add script to override

* refactor override

* add conditional render

* change layout

* fix homepage system spec

* add override file spec

* disable rubocop in conference_helper_override

* remove byebug

* enable rubocop Style/SingleArgumentDig

app/overrides/decidim/conferences/conference_speakers/index/replace_speaker.html.erb.deface

@@ -1,7 +1,6 @@
 <!-- replace "#conference_speakers-grid" -->
 
 <% divisor = Rails.application.secrets.speakers_divisor.dig(conference.slug.to_sym) %>
-
 <section id="conference_speakers-grid">
   <% if divisor && divisor.respond_to?(:each) %>
     <% all_filters = divisor.pluck(:position_filter).flatten.filter(&:presence) %>

app/overrides/decidim/conferences/conferences/show/change_layout.html.erb.deface

@@ -0,0 +1,10 @@
+<!-- replace "erb[loud]:contains('layouts/decidim/shared/layout_two_col')" -->
+
+<%
+lay = if conference_nav_items(current_participatory_space).empty?
+       "layouts/decidim/shared/layout_center"
+      else 
+       "layouts/decidim/shared/layout_two_col"
+      end
+%>
+<%= render layout: lay, locals: { reverse: true, main_enabled: false, columns: 10 } do %>

spec/lib/overrides_spec.rb

@@ -11,7 +11,8 @@
     files: {
       "/app/controllers/decidim/conferences/conferences_controller.rb" => "4e1bd7427cfd12c79391b451e07a2e2a",
       "/app/models/decidim/conference.rb" => "095732cb2451adfb9db7a46078dc3a51",
-      "/app/cells/decidim/conferences/content_blocks/highlighted_conferences_cell.rb" => "7f24462f802a2c277697205511103d90"
+      "/app/cells/decidim/conferences/content_blocks/highlighted_conferences_cell.rb" => "7f24462f802a2c277697205511103d90",
+      "/app/views/decidim/conferences/conferences/show.html.erb" => "93fa0d48a6117d3b1cb210ad1f17da7e"
     }
   },
   {