Stops the incremental search, if there is one currently in progress.
The StopIncrementalSearch method immediately stops any incremental search currently in progress, whether it was initiated by an end-user or in code.
This incremental search feature allows an end-user to search for a node based upon a column's displayed text. The search is performed in a forward direction, starting from the currently focused node and only against the currently focused column. To enable the incremental search feature, set the TreeListOptionsBehavior.AllowIncrementalSearch option to true.