Track changes that need saving

A way to track the changes made to a workflow during editing is in order to deal with:

• notifying the user, only if there are changes, that these changes will be lost if he opens a new workflow.
• highlighting the save button when there are changes
• implementing the undo-redo for the workflow that is being edited on the canvas.

The entities that hold these changes are:

• the nodesData: Map<string, NodeData>
• the edgesData: Map<string, LinkData>
• the displayedWorkflowInfo: GraphDetails
• the Nodes and Edges in the RF store

How to approach the issue:

• this seems to offer some solutions https://www.npmjs.com/package/zundo
• create a store that will subscribe to the above and store current, future and past states