fix migrate callback

apps/remix-ide/src/app/ui/landing-page/landing-page.js

@@ -400,26 +400,34 @@ export class LandingPage extends ViewPlugin {
       document.location.reload()
     }
 
+    const migrate = async () => {
+      tooltip('migrating workspace...')
+      try {
+        const workspaceName = await migrateToWorkspace(this.fileManager, this.filePanel)
+        tooltip('done. ' + workspaceName + ' created.')
+      } catch (e) {
+        return tooltip(e.message)
+      }
+    }
+
     const migrateWorkspace = async () => {
       modalDialog(
         'File system Migration',
         yo`<span>'Do you want to download your files to local device first?'</span>`,
         {
           label: 'Download und Migrate',
-          fn: async () => { await downloadFiles() }
+          fn: async () => { 
+            await downloadFiles()
+            migrate()
+          }
         },
         {
           label: 'Migrate',
-          fn: () => {}
+          fn: () => {
+            migrate()
+          }
         }
       )
-      tooltip('migrating workspace...')
-      try {
-        const workspaceName = await migrateToWorkspace(this.fileManager, this.filePanel)
-        tooltip('done. ' + workspaceName + ' created.')
-      } catch (e) {
-        return tooltip(e.message)
-      }
     }
 
     const img = yo`<img class=${css.logoImg} src="assets/img/guitarRemiCroped.webp" onclick="${() => playRemi()}"></img>`