Suggestion: Make the  'select all' checkbox in the grid more intuitive for the user.

When we combine virtuall scrolling and selection via checkboxes for the kendo grid the 'select all' checkbox in the header will only select rows which are already visible / paged in.

This is of course because kendo does not yet now about the not yet paged in rows.
On the other side this behavior is quiet unintuive for the user.
The user does not know about page border and expects the select all checkbox to check all rows.

The desired functionality could be realized by internally differentiating between two selection modes, one where the selected rows are are accessible via api (normal mode) and one where the deselected rows are accessible via api (mode where select all is enabled).

This would increase the user experience.