Fixed open mode in matplotlib widgets
Fixed open mode in matplotlib widgets

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