Clicking on a node while layout is running resets the layout to its initial position

[Yomguithereal]

Open power grid, select layout tab, FA2, start the algorithm, wait a little bit, click on a node (might be tricky since they are moving lol, that's a game in a sense), and notice the layout of the graph resets to its initial positions before FA2 was running.

[sim51]

The bug occurs when you do a quick drag'n'drop on a node while a layout is running.
And when you try to click on a node while the layout is runing, it's really easy to make a tiny drag'n'drop...

We were saving the nodes position in graphDataset on the "mouseUp" event, which trigger a reset of the sigma graph, ...
I fixed it by not saving the position while a layout is running. Nodes positions will be saved in the graphDataset at the stop of the layout.

[sim51]

Fixed in PR #302