LoadDataArgs.Filter and LoadDataArgs.Filters represent different filters after remove filtered column by column picker.

[anc-dev-lk]

Describe the bug
Consider a grid loading data with LoadData event. Once we remove a filtered column with column picker we have to reload the dataset. When we call grid.Reload() we are getting LoadDataArgs with Filter - with hidden column filter and Filters - without hidden column filter.

To Reproduce
Steps to reproduce the behavior:

1. Consider a datagrid loading data with LoadData event.
2. Add a filter to column 'someColumn'.
3. remove 'someColumn' by column picker.
4. Call grid.Reload() with PickedColumnsChanged event.
5. LoadDataArgs.Filter property and LoadDataArgs.Filters property represent different filters.

Expected behavior
LoadDataArgs.Filter and LoadDataArgs.Filtersshould represent same filter set.