Multi-select nodes in KnetMaps

[AjitPS]

feature request

[marco-brandizi]

@KeywanHP What is this? Can we close it?

[KeywanHP]

To be able to select multiple nodes or a sub-network in Network View (knetmaps.js). For example, to enable users to hide multiple nodes at once or do similar batch operations. It should be supported by cytoscape.js. We would need to implement it as a hold key + mouse drag/select event. @Arnedeklerk

[marco-brandizi]

It's probably not worth to do this before upgrading to last Cytoscape. Also, if it implies changes in the KnetMaps.js package, it's definitely to be done in the original repo, and not in the copy inside KnetMiner, which is a redundancy we're trying to remove.