2.6.0 07-Feb-2019 - add bottomLeftWidget and bottomRightWidget + protected acces to some widgets in ViewHybrid - add setVisible in dtkVisualizationViewOverlay - immediate rendering on update in Plot2D
2.6.0 07-Feb-2019 - add bottomLeftWidget and bottomRightWidget + protected acces to some widgets in ViewHybrid - add setVisible in dtkVisualizationViewOverlay - immediate rendering on update in Plot2D