Suspending link or applying packet filter leads to error

[grossmj]

The error happens when suspending a link or applying a packet filter, looks like the server didn't accept the request because of 'x': None, 'y': None. Indeed, these shouldn't be included in the request.

[piotrpekala7]

dev notes: need to check updateLink method in LinkService https://github.com/GNS3/gns3-web-ui/blob/master/src/app/services/link.service.ts#L65

[grossmj]

Note: there is no issue in version 3.0