Set 2D mode as default

[AnaBelgun]

For a simpler user experience the app should be opened in 2D mode by default.

[nf-s]

Done in

• Dev https://geo-rapp.dev.saas.terria.io/
• Test https://geo-rapp.test.saas.terria.io/

[nf-s]

Done in production

https://map.geo-rapp.org/