Add GeoJSON support for viewing files

What does this MR do?

Add support to visualize GeoJSON support as a map. When browsing GeoJSON files, identified by the .geojson file extension, the GeoJSON will be rendered to a map. You can toggle between viewing the GeoJSON code, and the visualized GeoJSON map.

What are the relevant issue numbers?

To address issue #4204 (moved).

Screenshots

Valid GeoJSON load successful

Error loading GeoJSON or parsing GeoJSON

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together Closes #4204 (moved)