HPCC-33169 ECL Watch v9 fix spinner on playground initial load

fix an issue where the graph and results/errors components on the ECL
playground page in the v9 UI would display spinners on intial load

Signed-off-by: Jeremy Clements <79224539+jeclrsg@users.noreply.github.com>

esp/src/src-react/components/ECLPlayground.tsx

@@ -471,10 +471,11 @@ export const ECLPlayground: React.FunctionComponent<ECLPlaygroundProps> = (props
     useOnEvent(document, "eclwatch-theme-toggle", handleThemeToggle);
 
     const submissionComplete = React.useMemo(() => {
+        if (!workunit?.Wuid) return true;
         return workunit?.StateID === WUStateID.Completed ||
             workunit?.StateID === WUStateID.Failed ||
             (workunit?.ActionEx === "compile" && workunit?.StateID === WUStateID.Compiled);
-    }, [workunit?.StateID, workunit?.ActionEx]);
+    }, [workunit?.StateID, workunit?.ActionEx, workunit?.Wuid]);
 
     const handleEclChange = React.useMemo(() => debounce((evt) => {
         if (editor.hasFocus()) {