GRC do not account for line color defined in time_sink and other sink

[Christophe Seguinot]

Hi

When using GNURadio Companion 3.9, one can define color in different sinks such as the time sink.

• these color are not taken into account
• the .py generated code variable colors only account for default colors (colors = ['blue', 'red', 'green', 'black', ...'dark blue'])
• so that self.qtgui_time_sink_x_0_0_0.set_line_color(i, colors[i]) does not apply correct colors

Does anyone knows how to correct this which seems to be a minor bug and fix?

Regards, Christophe