SceneWidget::setLighting was missing an update call
custom push button
make buttons in mode panel act like radiobuttons
return/enter activate the selected button
removed text argument from button constructor, because toolbar buttons will always be icon only
added push mode and icon-less push button constructor
use custom button on toolbar (top level)
set focus when opening a toolbar panel
fixed scene subview focus problem
toolbar tooltip system
replaced custom toolbutton push flag with type enum
added lighting mode tooltips