Free order_article resource from finance namespace; also unlock for role_orders

app/views/order_articles/_edit.html.haml

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+= simple_form_for [@order, @order_article], remote: true do |form|
+  .modal-header
+    = link_to t('ui.marks.close').html_safe, '#', class: 'close', data: {dismiss: 'modal'}
+    %h3= t '.title'
+  .modal-body
+    .fold-line
+      = form.input :units_to_order, label: 'Amount ordered', hint: '', input_html: {class: 'input-nano'}
+      -#= form.input :units_billed, label: 'invoice', input_html: {class: 'input-nano'}
+      = form.input :units_received, label: 'received', input_html: {class: 'input-nano'}
+      %p.help-block= t 'simple_form.hints.order_article.units_to_order'
+
+    .foo{style: 'clear:both'}
+
+    = simple_fields_for :article, @order_article.article do |f|
+      = f.input :name
+      = f.input :order_number
+      = f.input :unit
+
+    - if @order_article.article.is_a?(StockArticle)
+      %div.alert= t '.stock_alert'
+    - else
+      = simple_fields_for :article_price, @order_article.article_price do |f|
+        = f.input :unit_quantity
+        = f.input :price
+        = f.input :tax
+        = f.input :deposit
+      = form.input :update_current_price, as: :boolean
+  .modal-footer
+    = link_to t('ui.close'), '#', class: 'btn', data: {dismiss: 'modal'}
+    = form.submit class: 'btn btn-primary'

app/views/order_articles/_new.html.haml

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+= simple_form_for [@order, @order_article], remote: true do |form|
+  .modal-header
+    = link_to t('ui.marks.close').html_safe, '#', class: 'close', data: {dismiss: 'modal'}
+    %h3= t '.title'
+  .modal-body
+    = form.input :article_id, as: :select, collection: new_order_articles_collection, :label => Article.model_name.human # Why do we need the label?
+  .modal-footer
+    = link_to t('ui.close'), '#', class: 'btn', data: {dismiss: 'modal'}
+    = form.submit class: 'btn btn-primary'

app/views/order_articles/create.js.haml

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+$('#modalContainer').modal('hide');
+$('#result_table').prepend('#{j(render('finance/balancing/order_article_result', order_article: @order_article))}');
+$('#summaryChangedWarning').show();

app/views/order_articles/destroy.js.haml

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+$('#order_article_#{@order_article.id}, #group_order_articles_#{@order_article.id}').hide();

app/views/order_articles/edit.js.haml

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+$('#modalContainer').html('#{j(render("edit"))}');
+$('#modalContainer').modal();

app/views/order_articles/new.js.haml

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+$('#modalContainer').html('#{j(render("new"))}');
+$('#modalContainer').modal();

app/views/order_articles/update.js.erb

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+// Publish database changes.
+// See publish/subscribe design pattern in /doc.
+$(document).trigger({
+  type: 'OrderArticle#update',
+  order_article_id: <%= @order_article.id %>
+});
+
+$('#modalContainer').modal('hide');
+