Grid:Excel Style Filtering - selecting more than two text filters and their visualisation

[AnjiManova]

I noticed something else, and we talked with Desi: This is an additional issue that should be logged, but we can create such from this comment here.

When I select one list item, the Text filter is changed to Text filter (1), and "Equal" is selected from the filters. When I select two list items, the Text filter is changed to Text filter (2), and the "Custom filter" is selected from the filters. However, when I select three items, the Text filter is changed to Text filter (1), and there is no selection in the Text filters. Shouldn't it be showing the "Custom filter" again? This is replicated from the Master, and it is an issue there as well.

https://github.com/IgniteUI/igniteui-angular/assets/127843837/eb651517-be31-468c-81a7-98dc938d5417

I believe the logic should be: when two or more items are selected to apply the Custom filter, the filters should be indicated with (n) next to the Text filter.

Something interesting here is that everything looks fine if I select two items and then add more from the Custom filter. After manually adding an additional filter, there is no indication of which items/filters are selected.

https://github.com/IgniteUI/igniteui-angular/assets/127843837/73b7640c-7f0d-4ea9-b953-78786037dfbb

Originally posted by @AnjiManova in https://github.com/IgniteUI/igniteui-angular/issues/14328#issuecomment-2196387445