Allow DataTable's SortPlugin to Trigger Less Strictly

[Ri-gers]

Whenever I try to click on a column header of a DataTable that allows sorting (via the SortPlugin) I noticed that sorting will only be triggered if I press and release the left mouse button on the exact same position. So the mouse cannot even move one pixel inbetween. This is very strict in my opinion, since I have been used to have it work like in this GWT showcase (https://samples.gwtproject.org/samples/Showcase/Showcase.html#!CwCellTable). I would appreciate it if the triggering could work similar to that or to any Buttons in domino-ui: as long as I release the mouse button within the Button's dimensions, a click event will be triggered - not outside of them, of course.