slapos_accounting: Do not hide Add Invoice Line

  since accountants use directly the system, it is normal to allow include Invoice Lines.

master/bt5/slapos_accounting/PortalTypeHiddenContentTypeTemplateItem/hidden_content_type_list.xml

@@ -6,7 +6,4 @@
   <item>Computer Consumption TioXML File</item>
   <item>User Consumption HTML File</item>
  </portal_type>
- <portal_type id="Sale Invoice Transaction">
-  <item>Invoice Line</item>
- </portal_type>
 </hidden_content_type_list>
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master/bt5/slapos_accounting/bt/template_portal_type_hidden_content_type_list

 Cloud Contract Module | Cloud Contract
 Consumption Document Module | Computer Consumption TioXML File
-Consumption Document Module | User Consumption HTML File
-Sale Invoice Transaction | Invoice Line
+Consumption Document Module | User Consumption HTML File
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\ No newline at end of file