Various fixes to widget data escaping
Various fixes to widget data escaping

basnijholt/holoviews,basnijholt/holoviews,ioam/holoviews,vascotenner/holoviews,basnijholt/holoviews,vascotenner/holoviews,ioam/holoviews,vascotenner/holoviews,ioam/holoviews