Feature outline visual issues

[AliyanH]

closes #940 closes #919

Creating draft PR so I don't lose track of this.

The result of this PR is best visualized in the following experiment - https://maps4html.org/experiments/api/geojson/

TODO - Need to add a standalone container for storing outlines (with pointer-events: none;) instead of changing g element locations (which is what is currently being done) to ensure the outline of the feature being hovered or selected by keyboard is not being overlapped by any other features.