scide: remove ctrl-b shortcut

in most cases one can use `ctrl-shift-b` to reboot the server. not sure
if we need a shortcut for boot-or-quit

fixes #699

Signed-off-by: Tim Blechmann <tim@klingt.org>
class library: FreqScope - fix for starting scope after booting

Signed-off-by: Tim Blechmann <tim@klingt.org>