cubicweb-bootstrap #13835109 Log in page does no more display error messages [validation pending]

This is the counterpart of eb1d74ce6b61 in CW.

prioritynormal
typebug
done in1.2.2
load left0.000
closed by#459057637c9c Fix user message display in the login dialog
patchFix user message display in the login dialog [applied]