Allow user to modify scatter plot dot size

[cwsimmon]

Requested by Russ Bullock

The scatter plot function would be improved if the user could modify the size of the dots. The color can be changed, but the only way to overcome a dense overlapping cluster of dots is to zoom in. In general, the current dot size is too large for typical numbers of data points in the models we use today.

[lizadams]

Created scatterplot using the following command

./verdi.sh -f $cwd/data/model/CCTM46_P16.baseO2a.36k.O3MAX -s "O3[1]" -s "NO2[1]" -scatter "O3[1]" "NO2[1]"

I then right clicked on the plot, and selected Properties.
Then went to Configure Plot > Other
Tried modifying the Plot Points
Dot size from the default of 4 to another value - in this screenshot I selected the value 5.
I tried 1 and 2, and other values, but VERDI doesn't seem to be recognizing any of them.

Am seeing a screen pop up with an error:
Color Map Eror
x is not a valid number.

[yadongxuEPA]

Retested with VERDI_2.1.4_linux64_20220809.tar.gz on Atmos and VERDI_2.1.4_win64_20220809.zip on a Windows PC, found that this issue has resolved.
I was able to modify the scatter plot dot size and no error messages showed up.

[lizadams]

Confirmed that this worked with VERDI_2.1.4_mac_20221007.tar.gz