Using master. During startup, if you open `Window` -> `Console` and try and execute any command (can be garbage) `bitcoin-qt` will crash:
```bash
On branch pull/16118/local-merge

Process 89287 launched: '/Users/michael/github/bitcoin/src/qt/bitcoin-qt' (x86_64)
2019-05-29 09:57:56.276746-0400 bitcoin-qt[89287:939924] MessageTracer: Falling back to default whitelist
Process 89287 stopped
* thread #1, name = 'bitcoin-main', queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x8)
    frame #0: 0x00000001015158ba QtWidgets`QCompleter::popup() const + 10
QtWidgets`QCompleter::popup:
->  0x1015158ba <+10>: movq   0x8(%rdi), %rbx
    0x1015158be <+14>: movq   0x88(%rbx), %rax
    0x1015158c5 <+21>: testq  %rax, %rax
    0x1015158c8 <+24>: jne    0x101515942               ; <+146>
Target 0: (bitcoin-qt) stopped.
```

Not sure if just disabling the menu, like in #16118 would be ok, as a user might actually want to be able to run a command.
{
    QString connections = QString::number(clientModel->getNumConnections()) + " (";
    connections += tr("In:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_IN)) + " / ";
    connections += tr("Out:") + " " + QString::number(clientModel->getNumConnections(CONNECTIONS_OUT)) + ")";
    if(!clientModel->node().getNetworkActive()) {
        connections += " (" + tr("Network activity disabled") + ")";
    }
    ui->numberOfConnections->setText(connections);
}
void RPCConsole::setNumConnections(int count)
{
    if (!clientModel)
        return;
    updateNetworkState();
}
void RPCConsole::setNetworkActive(bool networkActive)
{
    updateNetworkState();
}
void RPCConsole::setNumBlocks(int count, const QDateTime& blockDate, double nVerificationProgress, bool headers)
{
    if (!headers) {
        ui->numberOfBlocks->setText(QString::number(count));
        ui->lastBlockTime->setText(blockDate.toString());
    }
}
void RPCConsole::setMempoolSize(long numberOfTxs, size_t dynUsage)