Adding Negative Functionallity to MapChartComponent

[mmehta2669]

Description

This changing the negative Functionality in the MapChartComponent. It does this bey changing the scaling to factor in the max-min, and adds and minShift that shifts the negative values into the positive with maintaining that the radius decreases as the absolute value of the negative meter increases

Fixes [#1205]

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Type of change

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• Note merging this changes the database configuration.
• This change requires a documentation update

Checklist

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• I have followed the OED pull request ideas
• I have removed text in ( ) from the issue request
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Limitations

I think that the color change for the negative meters could be more dynamic, however that may require a more refined color selection function

[mmehta2669]

Fixes #1205

[lawsj]

I see in the code that you added the various min functions to help set the size and scale of the circles that appear on the maps. This addition allows the user to have a more clear indication when a negative value is reported. Good job!