History: Phase 1

[mikekucera]

• Add a ‘snapshot’ button in the toolbar.
  • When clicked a request to create a snapshot is sent to the server.
  • A CouchDB database is created and the original database is replicated into it, this is the snapshot.
  • There is a limit of how many snapshots can be taken (say 10). If the limit has been reached then the oldest snapshot is automatically deleted.
• Add a ‘history’ panel to the sidebar.
  • Lists the snapshots (without thumbnails), has timestamp and maybe some basic metadata.
  • User can restore a snapshot.
  • User can delete a snapshot.

Discussion: https://github.com/cytoscape/cytoscape-explore/discussions/119

Issue for Phase 2: #123