using setLayout() instead, use
spacers or a nested layout to control the overall alignment of the layout contents within
the container, and use WWebWidget#setMaximumSize() (if needed) to let the layout contents determine the size of
the container.
An WGLWidget.ArrayBuffer refers to a javascript object, which cannot be used for
server-side rendering. The new way to accomplish a binary transfer of buffers is with the
added boolean argument in bufferSubDatafv()
WFormWidget
subclasses.