fixes #4578 - correct the way dim_props created

[KanvaBhatia]

Fixes #4578
instead of using the following -

dim_props = {
    "width": width or "100%",
    "height": height or "100%",
}

changing it to the following works

dim_props = {
    "width": width if width is not None else "100%",
    "height": height if height is not None else "100%",
}

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• Bug fix (non-breaking change which fixes an issue)

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[picklelo]

nice catch, thanks!