Added the option to specify mouse position for the DND events

[vzaidman]

breaking change: defaults drags and drops to the center of the relevant elements.

[zubivan]

@vzaidman Great to see that someone also needs this! Thanks for continuing on what I started! 👍
I was also thinking of creating a PR for this, though fixing integration tests is a bit of a hustle. And I'm not entirely sure whether my approach with createMouseEvent works nicely cross browser (https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/initMouseEvent).

[wushan]

this feature would be super useful. Hope this will be merge soon !

[pschroeder89]

@vzaidman Any work still being done on this?

[vzaidman]

it works as far as i know.
I didn't used it in the end.
whoever wants, please fix the tests and merge it.

[pschroeder89]

Tests should be fixed in this PR: PowToon#1

Please approve and merge so we can merge this PR, too

[pschroeder89]

This is turning out to be more work than it's worth for me. I'll try to revisit in a few days when I have some downtime.