Optimised map loading #10
Description
As global number of MC nodes increase rapidly, so does waiting time to show them in the map.
Make node loading in 2 passes.
The first pass loads nodes only from a smaller rectangular map area of interest which center is determined by the coordinates of the latest contact from Contacts in MeshCore app. In case map is opened from Web browser, center coordinates could probably be based on geo information of device IP address.
The second pass could go in the background to load the rest set of global nodes.
To further optimise first pass, the center coordinates could be stored on the app and updated when no value is available or on manual map refresh.
The size of rectangular area of interest could be adjustable in the app, too.