backoffice: open delete category confirmation in a popup (#57993)

tests/admin_pages/test_category.py

@@ -145,6 +145,7 @@ def test_categories_delete(pub):
     FormDef.wipe()
     app = login(get_app(pub))
     resp = app.get('/backoffice/forms/categories/1/')
+    assert 'popup.js' in resp.text
 
     resp = resp.click(href='delete')
     resp = resp.forms[0].submit('cancel')

wcs/admin/categories.py

@@ -172,6 +172,7 @@ class CategoryPage(Directory):
 
     def _q_index(self):
         html_top('categories', title=self.category.name)
+        get_response().add_javascript(['popup.js'])
         return template.QommonTemplateResponse(
             templates=['wcs/backoffice/category.html'],
             context={'view': self, 'category': self.category},