Modal hides when scrolling with scrollBar

[woricek]

Bug description: When text in modal is longer than the height of the page, it is scrollable. When scrolling with mousewheel everything works. When you move scroll with mouse, it is registered as clickedInBackdrop in ModalContainerComponent. Because scrollbar is part of the modal-container element. This hides the modal (when you dont set ignoreBackdropClick to true).

Plunker/StackBlitz that reproduces the issue:
Just add many lines of text to basic modal in demo page and you can reproduce the issue.

Versions of ngx-bootstrap, Angular, and Bootstrap:
ngx-bootstrap: 5.6.2

Expected behavior
Clicking inside scrollbar should not hide modal.