DiscreteSlider not respecting sizing_mode

[Kramin42]

DiscreteSlider does not respect the sizing_mode parameter. To reproduce in jupyter notebook:

import panel as pn
pn.extension()
slider = pn.widgets.DiscreteSlider(
    name='Integer Slider',
    options=[2**i for i in range(0, 9)],
    value=4,
    sizing_mode='stretch_width')
#workaround
#slider._composite.sizing_mode='stretch_width'
slider

It is possible to workaround using slider._composite.sizing_mode='stretch_width'. It appears that sizing_mode is never passed to the Column container.