Transaction Weight mechanism not considering proposals

[xlc]

Disaptchable calls can be dispatched indirectly (and many of them are designed to be dispatched indirectly, such as system::set_code). The transaction weight for those indirects calls are not considered at all right now.

e.g. collective::vote is FixedOperational(200_000) and may dispatch an arbitrary proposal, such as membership::add_member which is FixedNormal(50_000). The final weight for such transaction should be 250_000 instead of ignoring the weight of membership::add_member.

Related: #3730 can make dynamically increase weight possible when the proposal is dispatched.

[kianenigma]

related to #3730

also @sorpaas I think you will need the same thing for EVM, right? in this sense, proposals, srml-contracts and srml-evm are quite similar, they all have some inner code that needs to be accounted for post-dispatch.

[sorpaas]

Yeah I think it's related to EVM module as well.

[xlc]

I think this is fixed already.