QmlDesigner: Auto close 3D import dialog on success

Fixes: QDS-6573
Change-Id: I790a88a683e1cf4ca846148a4cde01b07b2a1844
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Samuel Ghinet <samuel.ghinet@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimportdialog.cpp

@@ -724,11 +724,13 @@ void ItemLibraryAssetImportDialog::setCloseButtonState(bool importing)
 
 void ItemLibraryAssetImportDialog::addError(const QString &error, const QString &srcPath)
 {
+    m_closeOnFinish = false;
     addFormattedMessage(m_outputFormatter, error, srcPath, Utils::StdErrFormat);
 }
 
 void ItemLibraryAssetImportDialog::addWarning(const QString &warning, const QString &srcPath)
 {
+    m_closeOnFinish = false;
     addFormattedMessage(m_outputFormatter, warning, srcPath, Utils::StdOutFormat);
 }
 
@@ -777,6 +779,10 @@ void ItemLibraryAssetImportDialog::onImportFinished()
         QString doneStr = tr("Import done.");
         addInfo(doneStr);
         setImportProgress(100, doneStr);
+        if (m_closeOnFinish) {
+            // Add small delay to allow user to visually confirm import finishing
+            QTimer::singleShot(1000, this, &ItemLibraryAssetImportDialog::onClose);
+        }
     }
 }
 
@@ -785,7 +791,7 @@ void ItemLibraryAssetImportDialog::onClose()
     if (m_importer.isImporting()) {
         addInfo(tr("Canceling import."));
         m_importer.cancelImport();
-    } else {
+    } else if (isVisible()) {
         if (ui->progressBar->value() == 100) // import done successfully
             accept();
         else

src/plugins/qmldesigner/components/itemlibrary/itemlibraryassetimportdialog.h

@@ -91,5 +91,6 @@ private:
     int m_optionsHeight = 0;
     int m_optionsRows = 0;
     QSet<QString> m_preselectedFilesForOverwrite;
+    bool m_closeOnFinish = true;
 };
 }