[Maps] Show legend for Scene

[dantetemplar]

Describe the feature

Each Scene will have legend property that will be displayed on the website (filled square box with color and description right to it).

Suggested solution

• get legend property from Scene.
• show as rows of colored square box and description right to it.
• mount it to some hardcoded position near right lower corner.
• add opportunity to hide/unhide.
• hide by default on mobiles.

Additional context

No response

[dantetemplar]

Do we actually need this?