Fix isMounted

src/containers/Configuration/Configuration.js

@@ -20,6 +20,8 @@ class Configuration extends IPCContainer {
     this.setRequestHandler(Constants.IPC_Set_Config_Values_Reply, this.onSetConfigValuesReply);
   }
 
+  _isMounted = false;
+
   state = {
     ChangedItems: [],
     ChangedObjectLookup: null,
@@ -70,12 +72,18 @@ class Configuration extends IPCContainer {
   };
 
   componentDidMount() {
+    this._isMounted = true;
     this.sendRequest(Constants.IPC_Get_Config_Template, {
       Provider: this.props.DisplayConfiguration,
       Version: this.props.version,
     });
   }
 
+  componentWillUnmount() {
+    this._isMounted = false;
+    super.componentWillUnmount();
+  }
+
   createItemList = (config, template) => {
     const objectList = [];
     const itemList = Object
@@ -162,7 +170,7 @@ class Configuration extends IPCContainer {
       });
     } else {
       this.props.notifyError(arg.data.Error, false, () => {
-        if (this.isMounted()) {
+        if (this._isMounted) {
           this.props.hideConfiguration();
         }
       });