Fixed merge to also handle GridLayouts
Fixed merge to also handle GridLayouts

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