Describe the feature:

We never introduced the ability to enabled/disable the point visibility on line and area chart. Currently the point visibility is dictated by the nature of the chart and the distance between visible points. if the distance is too close (~40px), we are hiding the points, if is larger then that threshold we visualize them.
This behaviour works great in most generic use case (multiple lines or areas) but doesn't work well with edge cases, where the number of series is pretty high. This causes an undesired behaviour where the visible points are not anymore useful but only creates confusion.

This feature should be included under the Appearance configuration of line and area charts with a switch that configure the visibility as enabled, disabled and auto. The auto, the way it works today, should be the default one.