cubicweb-brainomics #3455656 Use squareui [validation pending]

It should be possible to use squareui and remove the specific template of Brainomics.

prioritynormal
typebug
done in0.7.0
load0.500
load left0.000
closed by#fb0db36b7812 [views] Get ride of specific basetemplate, use squareui, closes #3455656$