QmlDesigner: Sort import list when importing multiple 3D assets

Fixes: QDS-13032
Change-Id: I616cb4dce95565f965cd61cce70fe22640930554
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

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

@@ -44,7 +44,7 @@
         </size>
        </property>
        <property name="sortingEnabled">
-        <bool>true</bool>
+        <bool>false</bool>
        </property>
       </widget>
      </item>

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

@@ -666,6 +666,16 @@ void ItemLibraryAssetImporter::postImport()
             data.optionsIndex = pd.optionsIndex;
             data.type = pd.sourceInfo.suffix().toLower();
             data.size = pd.assetSize;
+
+            bool inserted = false;
+            for (int i = 0; i < dataList.size(); ++i) {
+                if (dataList[i].name.compare(data.name, Qt::CaseInsensitive) > 0) {
+                    dataList.insert(i, data);
+                    inserted = true;
+                    break;
+                }
+            }
+            if (!inserted)
                 dataList.append(data);
         }