set welcome tab as default tab again

src/frontend/app.tsx

@@ -25,7 +25,7 @@ export function getApp() {
 
         return <>
             <MantineProvider theme={{colorScheme: preferredColorScheme}} withGlobalStyles withNormalizeCSS>
-                <Styledtabs defaultValue="editor" orientation="vertical" style={{height: '100%'}}>
+                <Styledtabs defaultValue="welcome" orientation="vertical" style={{height: '100%'}}>
                     <Allotment maxSize={'50%'}>
                         <Allotment.Pane preferredSize={250} minSize={250}>
                             <Stack style={{height: '100%', direction: 'column', gap: '0px'}}>