Dark mode map tiles

[BauwenDR]

🛠 Changes being made

• Invert colours of leaflet map so that it looks nicer for dark mode users
• Removed old testing data from project files (data was useless and outdated)
• Changed keepInView and autoPan for map markers so that it no longer causes a crash
• Updated target build environment to satisfy google play requirements

✨ What's the context?

User who where using dark mode where still being shown a light mode map.

🧪 Testing

No functional changes

📸 Screenshots (optional)

🏎 Quality check

• Are there any errors, console logs, debuggers or leftover code in your changes?
• Did you update the documentation for your code?

🐛 Linked issues

Write down all related issues to the pull request here. Use the closing syntax when an issue is deemed as resolved.

• Closes Dark mode map tiles #80
• Closes Dark Mode Map Tiles #78
• Closes Remove testing data #92
• Closes Forcing a landmarks marker with popup shown off screen crashes the app #75