Handling of Sun marker in RadWave

[patudom]

• Do NOT make Sun marker fade out because that can mislead people into thinking the Sun will disappear on the timescale of the RadWave's motion.
• Instead, create a marker that does not look like the Sun to show the Sun's location for all phases on the time slider. Alyssa requested a flat outlined square.
• Hex color to use for Sun marker is #FFFF0A