qt: Fix network adapter combobox being grayed out when PCap is initially enabled

src/qt/qt_settingsnetwork.cpp

@@ -127,3 +127,13 @@ void SettingsNetwork::on_pushButtonConfigure_clicked() {
     DeviceConfig::ConfigureDevice(network_card_getdevice(ui->comboBoxAdapter->currentData().toInt()), 0, qobject_cast<Settings*>(Settings::settings));
 }
 
+
+void SettingsNetwork::on_comboBoxPcap_currentIndexChanged(int index)
+{
+    if (index < 0) {
+        return;
+    }
+
+    enableElements(ui);
+}
+

src/qt/qt_settingsnetwork.hpp

@@ -25,6 +25,8 @@ private slots:
     void on_comboBoxAdapter_currentIndexChanged(int index);
     void on_comboBoxNetwork_currentIndexChanged(int index);
 
+    void on_comboBoxPcap_currentIndexChanged(int index);
+
 private:
     Ui::SettingsNetwork *ui;
     int machineId = 0;