Add colors to color profile

[arouinfar]

As discussed in today's design meeting, let's expand the color profile to make pixel polishing easier.

@jbphet @AgustinVallejo please add these to the color profile:

• Separate background colors for classical & quantum
• Experiment Type radio button stroke (selected & deselected)
• Experiment Type radio button fill (selected & deselected)
• Text color for the quantum scene (for the currently blue text)
• Coin stroke colors
• Coin fill colors
• Up & down colors
• Start Measurement button
• New Coin button
• Experiment button sets -- I don't care if each button has its own color in the profile or if there is one global color for all of these buttons, whichever is easiest.
• Initial Orientation/Basis States panel stroke
• Initial Orientation/Basis States panel fill

[AgustinVallejo]

Adding basic color profiles for coins. Some notes:
Since the black/magenta wasn't used consistently as fill or stroke, I just called it like this:

• headsColorProperty
• tailsColorProperty
• upColorProperty
• downColorProperty

Is it the right approach to separate the tails/down color into two different ones, or should the down coin always be a shared magenta regardless the system type?

[AgustinVallejo]

Back to @arouinfar for review, and let me know what you think of the above question.