fix for a crash on a typo in a name of a variable

src/widgets/context-menu.jsx

@@ -139,7 +139,7 @@ class ContextMenu extends React.Component {
           return props.onShowAlert(
             formatMessage(messages.clear_messages), // title
             formatMessage(messages.clear_messages_warning), // content
-            (() => { this.deleteMessages(true, false, params, errorHandler); }), // onConfirm
+            (_ => { this.deleteMessages(true, false, params, errorHandler); }), // onConfirm
             null, // "OK"
             true, // Show Reject button
             null  // "Cancel"
@@ -152,8 +152,8 @@ class ContextMenu extends React.Component {
         handler: (params, errorHandler) => {
           return props.onShowAlert(
             formatMessage(messages.clear_for_all), // title
-            formatMessage(message.delete_messages_warning), // content
-            (() => { return this.deleteMessages(true, true, params, errorHandler); }),
+            formatMessage(messages.delete_messages_warning), // content
+            (_ => { return this.deleteMessages(true, true, params, errorHandler); }),
             null, // "OK"
             true, // Show Reject button
             null  // "Cancel"

umd/index.dev.js

@@ -13047,7 +13047,7 @@ class ContextMenu extends (react__WEBPACK_IMPORTED_MODULE_0___default().Componen
         id: 'messages_clear',
         title: formatMessage(messages.clear_messages),
         handler: (params, errorHandler) => {
-          return props.onShowAlert(formatMessage(messages.clear_messages), formatMessage(messages.clear_messages_warning), () => {
+          return props.onShowAlert(formatMessage(messages.clear_messages), formatMessage(messages.clear_messages_warning), _ => {
             this.deleteMessages(true, false, params, errorHandler);
           }, null, true, null);
         }
@@ -13056,7 +13056,7 @@ class ContextMenu extends (react__WEBPACK_IMPORTED_MODULE_0___default().Componen
         id: 'messages_clear_hard',
         title: formatMessage(messages.clear_for_all),
         handler: (params, errorHandler) => {
-          return props.onShowAlert(formatMessage(messages.clear_for_all), formatMessage(message.delete_messages_warning), () => {
+          return props.onShowAlert(formatMessage(messages.clear_for_all), formatMessage(messages.delete_messages_warning), _ => {
             return this.deleteMessages(true, true, params, errorHandler);
           }, null, true, null);
         }