Implemented option completer for channels magic
Implemented option completer for channels magic

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