cubicweb-bootstrap #3741217 Buttons are some times not overloaded [validation pending]

move buttons code into site-cubicweb to avoid reload problems

prioritynormal
typebug
done in0.5.3
load0.100
load left0.000
closed by#d765c4aecc37 [buttons] move buttons patching code into site-cubicweb to avoid reload problems
patch[buttons] move buttons patching code into site-cubicweb to avoid reload problems [applied]