Fix bug of system trust store not loaded properly

* Bug: system trust store has default value of "true" regardless of "encryption" value.
* But if encryption is set to false, system trust store cannot be used, so system trust store should be saved as false if user does not enable encryption.
* It may confuse the user if they see encryption is set to false but system trust store is set to true. In this case, the driver will not do system trust store verification. The DSN window should reflect this accurately.

Author: alinaliBQ

cpp/src/arrow/flight/sql/odbc/flight_sql/ui/dsn_configuration_window.cc

@@ -246,6 +246,7 @@ int DsnConfigurationWindow::CreateEncryptionSettingsGroup(int posX, int posY, in
 
   std::string val = config.Get(FlightSqlConnection::USE_ENCRYPTION);
 
+  // Enable encryption default value is true
   const bool enableEncryption = driver::odbcabstraction::AsBool(val).value_or(true);
   labels.push_back(CreateLabel(labelPosX, rowPos, LABEL_WIDTH, ROW_HEIGHT,
                                L"Use Encryption:", ChildId::ENABLE_ENCRYPTION_LABEL));
@@ -270,6 +271,7 @@ int DsnConfigurationWindow::CreateEncryptionSettingsGroup(int posX, int posY, in
 
   val = config.Get(FlightSqlConnection::USE_SYSTEM_TRUST_STORE).c_str();
 
+  // System trust store default value is true
   const bool useSystemCertStore = driver::odbcabstraction::AsBool(val).value_or(true);
   labels.push_back(CreateLabel(labelPosX, rowPos, LABEL_WIDTH, 2 * ROW_HEIGHT,
                                L"Use System Certificate Store:",
@@ -297,6 +299,11 @@ int DsnConfigurationWindow::CreateEncryptionSettingsGroup(int posX, int posY, in
       CreateGroupBox(posX, posY, sizeX, rowPos - posY, L"Encryption settings",
                      ChildId::AUTH_SETTINGS_GROUP_BOX);
 
+  certificateEdit->SetEnabled(enableEncryption);
+  certificateBrowseButton->SetEnabled(enableEncryption);
+  useSystemCertStoreCheckBox->SetEnabled(enableEncryption);
+  disableCertVerificationCheckBox->SetEnabled(enableEncryption);
+
   return rowPos - posY;
 }
 
@@ -435,7 +442,9 @@ void DsnConfigurationWindow::SaveParameters(Configuration& targetConfig) {
     targetConfig.Set(FlightSqlConnection::DISABLE_CERTIFICATE_VERIFICATION,
                      disableCertVerificationCheckBox->IsChecked() ? TRUE_STR : FALSE_STR);
   } else {
+    // System trust store verification requires encryption
     targetConfig.Set(FlightSqlConnection::USE_ENCRYPTION, FALSE_STR);
+    targetConfig.Set(FlightSqlConnection::USE_SYSTEM_TRUST_STORE, FALSE_STR);
   }
 
   // Get all the list properties.