Merge branch 'fix-404-admin-delete' into 'master'

Fix 404 when deleting a project from the admin section

This is some additional fallout from the rails upgrade. Need to use plural namespaces in the path function to get project deletion to go back to the project listing.

See merge request !351

app/controllers/projects_controller.rb

@@ -102,7 +102,7 @@ class ProjectsController < ApplicationController
         flash[:alert] = 'Project deleted.'
 
         if request.referer.include?('/admin')
-          redirect_to admin_namespace_projects_path
+          redirect_to admin_namespaces_projects_path
         else
           redirect_to projects_dashboard_path
         end