Allow customization of the Validation Tooltip position.

For example, positioning the Tooltip based on the cell, on the input.

If we make an input readonly it doesn't get validated and wee need it to be validated on a readonly datepicker.

In kend.all.min.js we have

v=":input:not(:button,[type=submit],[type=reset],[disabled])"

and if i modify it by adding readonly like below

v=":input:not(:button,[type=submit],[type=reset],[disabled],[readonly])"

We need to make that code configurable because the workarounds concerining this problem it's buggy.