Improve performance Object List Filter Atlas
From documentation https://docs.wxwidgets.org/3.0/classwx_list_box.html
List box elements are numbered from zero and while the maximal number of elements is unlimited, it is usually better to use a virtual control, not requiring to add all the items to it at once, such as wxDataViewCtrl or wxListCtrl with wxLC_VIRTUAL style, once more than a few hundreds items need to be displayed because this control is not optimized, neither from performance nor from user interface point of view, for large number of items.