Incorrect ordering of signals and method replies

Method replies and signals are not received on replica side in the same order as created on source side.

Consider this code on source:

int foo()
{
    QTimer::singleShot(0, this, [this]() { emit someSignal(); });
    return 10;
}

when calling foo() on replica, this is the result:

// someSignal() emitted
// foo() returns 10

but it should be

// foo() returns 10
// someSignal() emitted

since the foo() returns before the signal is emitted.