Fall back to normal unlock if quick unlock fails

This commit resets the quick unlock state if quick unlock fails,
providing a better fallback behavior in the case of #7890 (the case
where Windows Hello suddenly becomes unavailable).

src/gui/DatabaseOpenWidget.cpp

@@ -339,18 +339,18 @@ QSharedPointer<CompositeKey> DatabaseOpenWidget::buildDatabaseKey()
         // try to retrieve the stored password using Windows Hello
         QByteArray keyData;
 #ifdef Q_CC_MSVC
-        if (!getWindowsHello()->getKey(m_filename, keyData)) {
-            // Failed to retrieve Quick Unlock data
-            m_ui->messageWidget->showMessage(tr("Failed to authenticate with Windows Hello"), MessageWidget::Error);
-            return {};
-        }
+        const auto keyDataOk = getWindowsHello()->getKey(m_filename, keyData);
+        const auto errorString = tr("Failed to authenticate with Windows Hello");
 #elif defined(Q_OS_MACOS)
-        if (!TouchID::getInstance().getKey(m_filename, keyData)) {
+        const auto keyDataOk = TouchID::getInstance().getKey(m_filename, keyData);
+        const auto errorString = tr("Failed to authenticate with Touch ID");
+#endif
+        if (!keyDataOk) {
             // Failed to retrieve Quick Unlock data
-            m_ui->messageWidget->showMessage(tr("Failed to authenticate with Touch ID"), MessageWidget::Error);
+            m_ui->messageWidget->showMessage(errorString, MessageWidget::Error);
+            resetQuickUnlock();
             return {};
         }
-#endif
         databaseKey->setRawKey(keyData);
         return databaseKey;
     }