add a fourth item to 'view box' defintion, dispctrl, so that we can later globally sort all boxes instead of having view boxes before component boxes. 'view' boxes order is configured through uicfg.primaryview_display_ctrl, 'component' boxes order through the cwproperty system.

slightly adapt title and hide boxes when view is called as a non primary view

allow to override is_primary result using an argument given to object constructor (have to be given to 'initargs' argument of .render like initargs={'is_primary': False}

typo