Merge #18993: qt: increase console command max length

fc6a637 qt: increase console command max length (10xcryptodev)

Pull request description:

  fix #17618
  Tested the examples bitcoin/bitcoin#17618 (comment) and works

ACKs for top commit:
  MarcoFalke:
    Approach ACK fc6a637
  hebasto:
    ACK fc6a637, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: 4975d7fa4c13a6b0f50f5754c3e04eb5a42b1411c385dc883d9948b6fc0dee38900ba2a418218a9a30ce39988a27d22f3ff3a02f0fa44f4136f01eef473efeca

Author: fanquake

src/qt/rpcconsole.cpp

@@ -467,6 +467,7 @@ RPCConsole::RPCConsole(interfaces::Node& node, const PlatformStyle *_platformSty
 
     // Install event filter for up and down arrow
     ui->lineEdit->installEventFilter(this);
+    ui->lineEdit->setMaxLength(16 * 1024 * 1024);
     ui->messagesWidget->installEventFilter(this);
 
     connect(ui->clearButton, &QPushButton::clicked, this, &RPCConsole::clear);