Clipping process stops when EOF and BOF are both reached at a time #151
Description
This issue is based on #150 (comment).
We should provide some additional actions (recalculations) while inserting a new item/items via adapter. Maybe manual clipping and making the EOF/BOF untrue? Clipping mechanism must work if there are enough items in the viewport, no matter how they were added and no matter if EOF and BOF were reached.