flint: displayed_channels is not implemented with live scatter
f = flint()
p = f.get_live_plot("default-scatter")
amesh(sy,-.1,.1,20,sz,-.3,0,30,.001,fluo_diode)
p.displayed_channels
!!! === AttributeError: 'ScatterPlotWidget' object has no attribute 'selectedPlotItem' === !!! ( for more details type cmd 'last_error(8)' )
p.displayed_channels = [fluo_diode.counter.name]