fix(start) - fix a case when spinner with same name already exists (#8824)

Author: GiladShoham

scopes/preview/preview/preview.start-plugin.tsx

@@ -96,7 +96,10 @@ export class PreviewStartPlugin implements StartPlugin {
     this.serversState[id] = { isCompiling: true };
     const spinnerId = getSpinnerId(id);
     const text = getSpinnerCompilingMessage(this.serversMap[id]);
-    this.logger.multiSpinner.add(spinnerId, { text });
+    const exists = this.logger.multiSpinner.spinners[spinnerId];
+    if (!exists) {
+      this.logger.multiSpinner.add(spinnerId, { text });
+    }
   }
 
   private handleOnDoneCompiling(id: string, results: CompilationResult) {