bug: remove clearValidation from onTryoutClick (#5955)

src/core/components/execute.jsx

@@ -22,6 +22,12 @@ export default class Execute extends Component {
         this.props.onExecute()
       }
       specActions.execute( { operation, path, method } )
+    } else {
+      // deferred by 40ms, to give element class change time to settle.
+      specActions.clearValidateParams( [path, method] )
+      setTimeout(() => {
+        specActions.validateParams([path, method])
+      }, 40)
     }
   }