Add display number of characters in passphrases (#5449)

Co-authored-by: Jonathan White <support@dmapps.us>

src/gui/PasswordGeneratorWidget.cpp

@@ -264,6 +264,8 @@ void PasswordGeneratorWidget::updatePasswordStrength(const QString& password)
     if (m_ui->tabWidget->currentIndex() == Diceware) {
         // Diceware estimates entropy differently
         health = PasswordHealth(m_dicewareGenerator->estimateEntropy());
+
+        m_ui->charactersInPassphraseLabel->setText(QString::number(password.length()));
     }
 
     m_ui->entropyLabel->setText(tr("Entropy: %1 bit").arg(QString::number(health.entropy(), 'f', 2)));