Test of drag feature doesn't work.

[DimitriChauvel]

Describe the bug

Move testing doesn't work with the new drag system developed with interactjs

To Reproduce

Steps to reproduce the behavior:

1. Go to feature/drag_and_drop_container
2. Remove line 7 in cypress/e2e/move.feature
3. Run demo: npm run demo
4. Run Cypress: npx cypress open

Additional Context

I think trouble comes from to cypress/e2e/drag-support.js, maybe cause position data of components is incremented by the event.dx and event.dy (dx and dy are equal to the new mouse position minus the last saved mouse position) of interactjs. Before that we saved at each event, in the position data, just the mouse position minus the delta between the mouse and the component origin. So there was no need for intermediate data.

[sohzaz]

After investigation:

1. The interactjs library seems to completely ignore mouse events triggered by cypress, only fix I can see is not using interactjs.
2. The test case itself does not work when reproduced manually, stacking #external1 on top of #network1 does not add it to the latter's children list.