Corrections in SchedulesController

- Controler file name pluralized
- Load and authorization fixed and improved
- Consider that save can fail in create action
- Eliminate unnecessary if in update action
- Ability and tests related to the schedules link in the admin sidebar fixed

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

@@ -1,32 +0,0 @@
-.row
-  .col-md-12
-    .page-header
-      %h1 Schedules
-      %p.text-muted
-        The schedules for your conference
-.row
-  .col-md-12
-    %table.table.table-hover#event_types
-      %thead
-        %th Schedule
-        %th Selected
-        %th Actions
-      %tbody
-        - @schedules.each do |schedule|
-          %tr
-            %td
-              Schedule
-              = schedule.id
-            %td
-              = (schedule == @selected_schedule) ? 'Yes' : 'No'
-            %td
-              .btn-group{role: "group"}
-                = link_to 'Show', admin_conference_schedule_path(@conference.short_title, schedule.id),
-                method: :get, class: 'btn btn-primary'
-                = link_to 'Delete', admin_conference_schedule_path(@conference.short_title, schedule.id),
-                method: :delete, class: 'btn btn-danger', data: { confirm: "Do you really want to delete Schedule #{schedule.id}?" }
-
-.row
-  .col-md-12.text-right
-    = link_to 'Add Schedule', admin_conference_schedule_index_path(@conference.short_title),
-    method: :post, class: 'btn btn-primary'