GWW-186: Add slider to select satellite image buffer size

[lsarni]

Ticket: https://issuetracker.deltares.nl/browse/GWW-186

Changes:

• Add "Advance settings" panel on the comparison map
• Add slider to choose the buffer size for satellite images, max 100km
• Include the selected buffer on the embedded map
• Show error message if we can't generate the satellite images

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