Merge branch 'shindere/fix-debug-toolbar-lms' for PR #3401

AUTHORS

@@ -144,3 +144,5 @@ Christine Lytwynec <clytwynec@edx.org>
 John Cox <johncox@google.com>
 Ben Weeks <benweeks@mit.edu>
 David Bodor <david.gabor.bodor@gmail.com>
+Sébastien Hinderer <Sebastien.Hinderer@inria.fr>
+

cms/envs/devstack.py

@@ -59,7 +59,8 @@ DEBUG_TOOLBAR_PANELS = (
 )
 
 DEBUG_TOOLBAR_CONFIG = {
-    'INTERCEPT_REDIRECTS': False
+    'INTERCEPT_REDIRECTS': False,
+    'SHOW_TOOLBAR_CALLBACK': lambda _: True,
 }
 
 # To see stacktraces for MongoDB queries, set this to True.