Change Fire Widget buffer color

[abprins]

• [x] Change fill and outline color to white
• [x] Increase thickness of buffer outline slightly (1.5pt? 2pt?)
• [x] Decrease transparency of fill (75%?)

[jmaxmarno]

@aprins-innovate - Can be tweaked by saving the layer symbology here: https://epa.maps.arcgis.com/home/item.html?id=b76b8477849a40e3827f9c45d3bae783#visualize