Graph Nodes not properly reset when updating the graph without restart

[James-Ansley]

When the graph updates, it seems like nodes in the graph are not properly updated.
This happens when committing from visual git, and then updating the graph.

To reproduce this: commit to a repo using visual git (note, committing to empty repos is not working currently #307 ) then update the graph (note, graph does not update after commits #297 ) I did this by quickly switching repos. The graph does not display correctly.

This issue has been inconsistent in that sometimes there are no edges, sometimes there are blank nodes etc. But every time the graph does not update properly regardless. When restarting visualGit it should display correctly

Edit: Exciting news! I have discovered some graphs do not display correctly even after a restart!

Before restart:

After Restart:

[James-Ansley]

Related to #58 - but I have noticed edges disappearing as well recently
Related to #316, #215, #194 - It seems some graphing functionality has changed that has caused a lot of similar issues with the graphs