Flashing graph when drag&drop node

[danielcaldas]

Is your feature request related to a problem? Please describe.
The library offers the ability to drag and drop nodes out of the box. At the same time, the library allows highlight of neighbors only when configs such as linkHighlightBehavior and nodeHighlightBehavior are active.

The problem is, when you have the highlighted behavior active and you drag and drop around nodes, it gets a bit distracting for the user to see the graph flashing when the mouse moves out of the node but is still performing the drag movement. See below GIF animation to get a picture of the flashing issue.

Describe the solution you'd like
While the user is perform a drag&drop just make sure that highlight behavior is locked and cannot be modified by the fact that the mouse is leaving the node.

Basically ensure that the following logic is in place:

if the user is performing a drag and drop should freeze the updates of the node and link highlighted values.

Describe alternatives you've considered
None so far.

[danielcaldas]

Fixed with #242