Use spatial_colors by default in Evoked.plot()

[hoechenberger]

When using Evoked.plot(), in fact I always want to use spatial_colors=True as this feature is so simple, yet extremely helpful.

Problem is, on the first try I almost always forget to pass the respective parameter, so then I need to amend my code and re-run it.

Also I believe that many users are probably not aware of the feature, as … well, as it's not the default.

Could we not make it such that if we have sensor locations, we use spatial_colors=True by default?

We'd still keep the parameter to allow for manual adjustment, of course.

WDYT?

cc @sappelhoff @cbrnr @alexrockhill @adam2392

[cbrnr]

Fine with me!

[sappelhoff]

Fine with me as well :+1:

[alexrockhill]

Definite +1

[agramfort]

No objection but make sure no warning is raised by default if no channel locations are present

This maybe suggests a spatial_colors=‘auto’ by default

[mmagnuski]

+1 from me too.

[drammock]

reopened by #11151