Updated the macosx backed figure manager show function to bring the
figure to the front upon execution.
remove _orig_color which is duplicate of _rgb
New rcParams to set pyplot.suptitle() defaults

Two new rcParams are introduced:

- figure.titlesize (xx-large)
- figure.titleweight (normal)

Allow to set the pyplot.suptitle() default font size and weight.
Add a "whats_new" entry for the new figure.title* rcParams.
Merge pull request #3762 from vmarkovtsev/patch-1

MNT : WebAgg: flush stdout after printing, redirect "stopped" message to stder
Fix warning in docs
Factor more behavior into the _SelectorWidget class.
Fix indentation
Put onselect in __init__, fix syntax error, make sure lines are animated.
Add tests for the selection widgets
Remove private event handling methods to allow for subclassing old api
Remove draw_rubberband and minor cleanup
Add to default_test_modules
Attempt to fix affine transform error
Fix affine transform error
Add test cleanup decorator
Move cleanup to the individual checks
Fix failing tests
Fix pep8 error
Improve handling of out-of-bounds releases