Faster loading of the Data Sources List page

[Limraj]

Expected Behavior Lazy loading of points in the data sources list should be introduced. Perhaps you could also not load the full Data Point data, they are not needed there.

Actual Behavior The Data Source is loaded into the view along with all Data Points, which causes the view to load longer and longer, along with the size of the configuration.

Specifications Scada-LTS Version: <= 2.7.5.3