feat: make theme change interactive

[dfguerrerom]

This PR does the following:

• change default dark and light theme colors
• live theme colors change when theme button is clicked
• add new 'reactive' colors to the theme
• change the basemap tile to its light/dark variant if they are the default carto basemaps
• automatically update colors on disclaimers using the logic already set
• do some small test corrections

See the result:

screen-capture.webm

@12rambau, the video doesn't show the transition so well but I think it is because of the number of frames that my recording tool use.

I know the test will fall because of the gee issue, but that PR stills on hold.

[12rambau]

I love it, checked the code and found nothing to complain about. This feature is so much better than the previous implementation.