fix: Patch Toolbar Middleware Response (django-cms#7856)

* feat: new tests to validate response type depending on CMS_TOOLBAR_HIDE

* feat: return correct type from __call__ as defined by django

cms/middleware/toolbar.py

@@ -25,7 +25,7 @@ def __init__(self, get_response):
     def __call__(self, request):
 
         if not self.is_cms_request(request):
-            return
+            return self.get_response(request)
 
         edit_on = get_cms_setting('CMS_TOOLBAR_URL__EDIT_ON')
         edit_off = get_cms_setting('CMS_TOOLBAR_URL__EDIT_OFF')

cms/tests/test_toolbar.py

@@ -179,6 +179,16 @@ def test_cms_internal_ips_iptools_bad_range(self):
             request = self.get_page_request(None, self.get_staff(), '/en/example/')
             self.assertFalse(hasattr(request, 'toolbar'))
 
+    @override_settings(CMS_TOOLBAR_HIDE=True)
+    def test_correct_response_type_returned_hiding_toolbar(self):
+        response = self.client.post('/')
+        self.assertIsInstance(response, HttpResponse)
+
+    @override_settings(CMS_TOOLBAR_HIDE=False)
+    def test_correct_response_type_returned_showing_toolbar(self):
+        response = self.client.post('/')
+        self.assertIsInstance(response, HttpResponse)
+
 
 @override_settings(CMS_PERMISSION=False)
 class ToolbarTests(ToolbarTestBase):