TreeGrid: Do not load data if you call the load() function

[vadim@lab-event.com]

If we disable autoLoad, and after call tree.store.load(), data not loaded

You can check it on your example https://bryntum.com/products/grid/examples/tree-grouping/

[alex.l]

Thank you for the report, we'll investigate this problem. That's caused by TreeGroup feature.
Here is link to track the status: https://github.com/bryntum/support/issues/6120