cubicweb #13521493 Erreur on cancel action [done]

Cancel buttons on some forms (deleton confirmation vid=deleteconf, f.e) crush with the following error :

RequestError: invalid action '__action_cancel'
priorityimportant
typebug
done in<not specified>
load left0.000
closed by#cd1183a65ebb Fix cancel action on deletion confirmation form
patchFix cancel action on deletion confirmation form [applied]