electron: Open dialogs are not modal (eclipse-theia#10768)

Pass the electron BrowserWindow to the dialog.showOpenDialog command, to
make the dialog modal.


Signed-off-by: Alexandra Buzila <abuzila@eclipsesource.com>

packages/filesystem/src/electron-browser/file-dialog/electron-file-dialog-service.ts

@@ -49,7 +49,8 @@ export class ElectronFileDialogService extends DefaultFileDialogService {
     override async showOpenDialog(props: OpenFileDialogProps, folder?: FileStat): Promise<MaybeArray<URI> | undefined> {
         const rootNode = await this.getRootNode(folder);
         if (rootNode) {
-            const { filePaths } = await electronRemote.dialog.showOpenDialog(this.toOpenDialogOptions(rootNode.uri, props));
+            const electronWindow = electronRemote.getCurrentWindow();
+            const { filePaths } = await electronRemote.dialog.showOpenDialog(electronWindow, this.toOpenDialogOptions(rootNode.uri, props));
             if (filePaths.length === 0) {
                 return undefined;
             }