cubicweb-bootstrap #3641673 Provide a cw_compatible css in prod [validation pending]

As long as cubicweb-bootstrap dont provide a full bootstrap coverage of CW html, we need some css roles to compensate.

Those rules must be activated in production, but not while develloping.

prioritynormal
typeenhancement
done in0.5.0
load0.300
load left0.000
closed by#50d524682170 [css] provide a cw_compatible stylesheets to be activated in prod (closes #3641673)
patch[css] provide a cw_compatible stylesheets to be activated in prod (closes #3641673) [folded][css] provide a cw_compatible stylesheets to be activated in prod (closes #3641673) [applied]