improve task i18n (affects foodcoops#137)

app/views/tasks/_archive_tasks.html.haml

@@ -5,13 +5,13 @@
 %table.table.table-striped
   %thead
     %tr
-      %th= t '.due_date'
-      %th= t '.task'
-      %th= t '.who'
+      %th= heading_helper Task, :due_date
+      %th= heading_helper Task, :name
+      %th= heading_helper Task, :user_list
       %th
   %tbody
     - @tasks.each do |task|
       %tr
         %td= task.due_date unless task.due_date.nil?
-        %td= link_to t('.task_format', name: task.name, duration: task.duration), task_path(task)
+        %td= link_to task_title(task), task_path(task)
         %td= task_assignments task

app/views/tasks/_list.haml

@@ -1,9 +1,9 @@
 %table.table.table-striped
   %thead
     %tr
-      %th= t '.due_date'
+      %th= heading_helper Task, :due_date
       %th
-      %th= t '.task'
+      %th= heading_helper Task, :name
       %th{:colspan => '2'}
         = t '.who'
         %small= t '.who_hint'
@@ -15,7 +15,7 @@
         %td
           - if task.periodic?
             %i.icon-repeat{title: t('tasks.repeated')}
-        %td= link_to t('.task_format', name: task.name, duration: task.duration), task_path(task)
+        %td= link_to task_title(task), task_path(task)
         %td
           = task_assignments task
           = highlighted_required_users task

app/views/tasks/show.haml

@@ -3,22 +3,22 @@
 
 %section
   %dl.dl-horizontal
-    %dt= Task.human_attribute_name(:name)
+    %dt= heading_helper Task, :name
     %dd= @task.name
     - if @task.description.present?
-      %dt= Task.human_attribute_name(:description)
+      %dt= heading_helper Task, :description
       %dd= simple_format(@task.description)
     - if @task.due_date.present?
-      %dt= Task.human_attribute_name(:due_date)
+      %dt= heading_helper Task, :due_date
       %dd 
         = format_date(@task.due_date)
         - if @task.periodic?
           %i.icon-repeat{title: t('tasks.repeated')}
-    %dt= Task.human_attribute_name(:duration)
+    %dt= heading_helper Task, :duration
     %dd= t('.hours', count: @task.duration)
-    %dt= Task.human_attribute_name(:user_list)
+    %dt= heading_helper Task, :user_list
     %dd= task_assignments(@task)
-    %dt= Task.human_attribute_name(:workgroup)
+    %dt= heading_helper Task, :workgroup
     %dd
       - if @task.workgroup
         = link_to @task.workgroup.name, workgroup_tasks_path(workgroup_id: @task.workgroup_id)