Allow sending panels to SourceTV client via settings

[A1mDev]

Code tested in game Left4Dead2, menu successfully sent to SourceTV client.

Close #1563
Related PR #1775

[asherkin]

This seems like too much faff around it, based on the discussion in the previous PR just removing the pPlayer->IsFakeClient() check seems good enough? The client index is passed in, I don't think we need an additional param of "yes, I really meant to pass that client index in".

[A1mDev]

I think it would be nice to keep the default behavior?

[A1mDev]

It's just that the old PR was never accepted and I thought it wasn't worth changing the default behavior, of course I can remove the extra code if you say so.

[A1mDev]

Done, I made one check for SourceTV, I don't know if it is needed for other bots, let someone else make a PR if it is needed for ReplayClient. There is no way to check for ReplayClient.

[asherkin]

Presumably nothing breaks if sent to other fake clients? We should err on trusting the plugin that it is doing what it wants.

[A1mDev]

Done

[asherkin]

LGTM, @psychonic ?