While regtesting with [bitcoin-spock](https://github.com/msgilligan/bitcoin-spock) I noticed at some point the transaction creation via `sendtoaddress -> CreateTransaction()` fails, because the created transaction is larger than `MAX_STANDARD_TX_SIZE`.

During the process a lot of raw transactions are created, which have smallish outputs and when then using `sendtoaddress`, it appears to attempt to create a transaction that spends too many of those dust-ish outputs.

The transaction to create does not have many outputs, but it looks like it's caused by the coin selection, which selects too many inputs. Testing was done with a 0.9 branch, but on the first glimpse I believe this issue is as well be present in 0.10. If this is a known issue, and if there is already a guard against this behavior, I'd be happy about a hint.

Sorry in advance, I do not have a test script to reproduce this issue in an isolated manner. A potential fix would probably require to adjust the coin selection, so that it selects a combination of coins, which, in addition to the size of the rest of the transaction, is still smaller than the limit.

const CAmount& nTargetValue, const CCoinControl& coin_control,
                                           const CoinSelectionParams& coin_selection_params)
{
    
    CAmount selection_target = nTargetValue - pre_set_inputs.total_amount;
    
    if (!coin_control.m_allow_other_inputs && selection_target > 0) return std::nullopt;
    
    if (selection_target <= 0) {
        SelectionResult result(nTargetValue, SelectionAlgorithm::MANUAL);
        result.AddInputs(pre_set_inputs.coins, coin_selection_params.m_subtract_fee_outputs);
        result.ComputeAndSetWaste(coin_selection_params.min_viable_change, coin_selection_params.m_cost_of_change, coin_selection_params.m_change_fee);
        return result;
    }