Small improvement

src/editor/components/tabheader.tsx

@@ -8,11 +8,9 @@ interface TabHeaderProps {
 }
 
 function TabHeader({ tabs, initialTabIndex, children }: TabHeaderProps) {
-    if (initialTabIndex === undefined) {
-        initialTabIndex = 0;
-    }
-
-    const [currentIndex, setCurrentIndex] = useState<number>(initialTabIndex);
+    const [currentIndex, setCurrentIndex] = useState<number>(
+        initialTabIndex ?? 0
+    );
     return (
         <div className={"tab-view"}>
             <div className={"tab-header"}>