Remove datatables if there is no data

app/views/admin/booths/index.html.haml

@@ -29,6 +29,7 @@
           (
           = link_to "#{@conference.booth_limit} booths", edit_admin_conference_path(@conference.short_title)
           )
+    - if @booths.any?
       %table.table.table-striped.table-bordered.table-hover.datatable
         %thead
           %th

app/views/admin/tracks/index.html.haml

@@ -7,6 +7,7 @@
         Categorize events in your conference
 .row
   .col-md-12
+    - if @tracks.any?
       %table.table.table-hover.table-striped.table-bordered.datatable#tracks
         %thead
           %th ID

spec/features/tracks_spec.rb

@@ -42,11 +42,10 @@ feature Track do
 
       expected.to change { Track.count }.by(-1)
       expect(flash).to eq('Track successfully deleted.')
-      within('table#tracks') do
+      expect(page.has_css?('table#tracks')).to be false
       expect(page.has_content?(track.name)).to be false
       expect(page.has_content?(track.description)).to be false
     end
-    end
 
     scenario 'updates a track', feature: true, js: true do
       create(:track, program_id: conference.program.id)