cubicweb-bootstrap #5740885 Bad markup for some panels [validation pending]

Found using bootlint:

bootlint: E026 .panel-title must have a .panel-heading parent
prioritynormal
typebug
done in1.2.0
load0.500
load left0.000
closed by#7b9c0e821104 [views] Proper tag soup for bootstrap panel titles (closes #5740885)
patch[views] Proper tag soup for bootstrap panel titles (closes #5740885) [applied]