Schematic cannot be displayed in multiple editors simultaneously.

[Federerer]

Currently we are using Tag property on schematic controls to link between component view <-> model, which causes issues when you try to load the same schematic in multiple editors. To avoid this we are making clones:

var clone = Circuit.Schematic.Deserialize(editor.Schematic.Serialize(), Log); 

which is very slow (I'm getting a 5s ui lag moderately big schematic). So we should probably switch to something different e.g. keeping a Dictionary in SchematicControl

[dsharlet]

I just looked at Deserialize, because I've been annoyed how slow that is too sometimes. I think it has a ridiculous performance bug that should be easy to fix. We rebuild all the nodes every time each element of the circuit is added to the schematic...

[dsharlet]

Also, #128 contributed to this in a weird way, because we do a lot of circuit graph algorithms when named wires are changed.

I was being really lazy on this code the first time around because I didn't think it would matter. I'm working now on rewriting this to use proper graph algorithms, which should make them way, way faster.

[dsharlet]

Please take a look at #189 and see if you still think we need to avoid the cloning. I agree the cloning is not ideal, but it's simple, and maybe it's not a problem if deserialization isn't absurdly slow.