Changed the drawnow from line 243 to 247

[UgoBruzadin]

Changed the drawnow line to increase plotting speed. Gain about 50% or more in plotting speed, plots all head models at the same time.

[lucapton]

@UgoBruzadin Thank you for submitting this fix. It seem like a good change.

@nucleuscub @arnodelorme This code was originally taken from pop_selectcomps in EEGLAB therefore this change should likely go there as well in addition to being merged into ICLabel which has a local copy of viewprops. I've confirmed this fix speeds the plotting up significantly and works without issue on Windows 10. Would one of you check to see that this works on any other platforms that EEGLAB supports? Once I get your confirmation, I'll merge this and copy the change over to ICLabel as well.

[UgoBruzadin]

@lucapton No problem! I'm glad to help. I hope it's useful!