Final layout tweaks, especially mobile

[tmfrnz]

SMALL "mobile" (< 721px)

• editorial content
• footer
• home
• header
• explore | overview
• explore | realm
• explore | biome
• explore | group
• analyse | settings
• analyse | results
• analyse | change settings
• map | key/settings

MEDIUM "tablet portrait" (> 720px, < 1153px)

• header
• home
• footer
• explore | overview
• explore | realm
• explore | biome
• explore | group
• editorial content
• analyse | settings
• analyse | results
• analyse | change settings
• map | key/settings