Drop JQuery-UI. Fixes Issue #353 partly

app/views/admin/conference/new.html.haml

@@ -9,6 +9,6 @@
       = f.inputs 'Scheduling' do
         = f.input :timezone, as: :time_zone, hint: 'Please select in what time zone your conference will take place.'
         = f.input :start_date, as: :string, input_html: { id: 'conference-start-datepicker', required: 'required' }
-        = f.input :end_date, as: :string, input_html: { id: 'conference-end-datepicker', required: 'required'  }
+        = f.input :end_date, as: :string, input_html: { id: 'conference-end-datepicker', required: 'required' }
       = f.actions do
         = f.action :submit, button_html: {class: 'btn btn-success pull-right'}

app/views/layouts/_user_menu.html.haml

@@ -15,8 +15,12 @@
   %li.divider
     %li
       = link_to(admin_conference_index_path()) do
-        %span.glyphicon.glyphicon-home
-        Administration
+        - if Conference.any?
+          %span.glyphicon.glyphicon-home
+            Administration
+        - else
+          %span.glyphicon.glyphicon-plus
+          Create Conference
     -if @conference and @conference.id and can? :show, @conference
       %li
         = link_to(admin_conference_path(@conference.short_title)) do