Tips for slow loading of projects in the mobile app #520

Document how to debug / add some tips about how to make loading of a project faster in the mobile app.
Some of the culprits: number of layers, number of online layers, complicated or invalid geometry, number of features in a layer, complicated symbology.

https://merginmaps.slack.com/archives/C02D4SQ3DAT/p1729700532690069