9.3 Multigraph enable/disable

Hello,

The new feature to enable/disable a feed in the multigraph is really great!
Now it would be really nice for me to have the possibility when you create the multigraph, i can set some feeds disabled so their state is saved as disabled.

This would mean when the graph is showed in the dashboard some feeds would be disabled by default, and can be enabled if wanted.

This would help to allow a default graph with only highly necessary data, and if the user wants, to enable additional data.