Add surveys; custom generated by admins

Available during registration or after conference

Co-authored-by: Shyukri <shshyukriev@suse.com>
Co-authored-by: Henne <hvogel@opensuse.org>
Co-authored-by: Moises <mdeniz@suse.com>

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

@@ -0,0 +1,38 @@
+.row
+  .col-md-12
+    .page-header
+      %h1
+        Surveys
+        = link_to 'New', new_admin_conference_survey_path(@conference.short_title, survey: {  surveyable_type: 'Conference', surveyable_id: @conference.id }), class: 'btn btn-success pull-right'
+      %p.text-muted
+        Available surveys for this conference
+
+
+- if @surveys.any?
+  .row
+    .col-md-12
+      %table.table.table-hover.datatable#surveys
+        %thead
+          %th Title
+          %th When
+          %th Start Date
+          %th End Date
+          %th Actions
+        %tbody
+          - @surveys.each_with_index do |survey, index|
+            %tr
+              %td
+                = link_to survey.title, admin_conference_survey_path(@conference.short_title, survey)
+              %td
+                = survey.target
+              %td
+                = survey.start_date
+              %td
+                = survey.end_date
+              %td
+                .btn-group
+                  = link_to 'Edit', edit_admin_conference_survey_path(@conference.short_title, survey),
+                  class: 'btn btn-primary'
+                  = link_to 'Delete', admin_conference_survey_path(@conference.short_title, survey),
+                  method: :delete, class: 'btn btn-danger',
+                  data: { confirm: "Do you really want to delete #{survey.title}?"}