Various fixes to map views from Bill. Here are his descriptions:

    I figured out why we can no longer drag the map and why the data tips
    were no showing. Enclosed are the changed files.

    The MapPointView contains and lies on top of the svg defined by the
    MapPointLayer. It is opaque to mouse events (pointer-events) by default.
    So the solution is to give it a ‘pointer-events: none’ style. But this
    affects the points as well, so we have to give them a css style
    ‘pointer-events: all.’ This seems to work.

    The data tips for point were still turned off because turning them on
    led to an attempt to determine precision of an axis view. But the map
    has no axis view. A bit of a kludgy work around fixes that.

    I ... discovered I had broken drag and drop for the area map by
    overzealously not drawing the point view, which is required for getting
    a Raphael paper on which to draw drag target stuff.

    Also I fixed the map points to have a dark border.

[Fixes #74983348] [Fixes 74983698]