Load OP Costs JS files into WP view

app/views/hooks/costs/_view_work_package_overview_attributes.html.erb

@@ -0,0 +1,22 @@
+<%#-- copyright
+OpenProject Costs Plugin
+
+Copyright (C) 2009 - 2014 the OpenProject Foundation (OPF)
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+version 3.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+++#%>
+
+<%= javascript_include_tag 'angular/openproject-costs-app.js' %>
+<%= javascript_include_tag 'angular/work_packages/directives/summarized-cost-entries-directive.js' %>

lib/open_project/costs/hooks/work_package_hook.rb

@@ -30,6 +30,8 @@ class OpenProject::Costs::Hooks::WorkPackageHook < Redmine::Hook::ViewListener
 
   render_on :view_work_packages_move_bottom, :partial => 'hooks/costs/view_work_packages_move_bottom'
 
+  render_on :view_work_package_overview_attributes, partial: 'hooks/costs/view_work_package_overview_attributes'
+
   # Updates the cost object after a move
   #
   # Context: