ENH: Doing an extra render in enabled_changed to avoid occasional rendering gliches.  Also changed the desc string to be little clearer to the user.
ENH: Doing an extra render in enabled_changed to avoid occasional
rendering gliches.  Also changed the desc string to be little clearer to
the user.


liulion/mayavi,dmsurti/mayavi,alexandreleroux/mayavi,dmsurti/mayavi,alexandreleroux/mayavi,liulion/mayavi