Add notification when merging changes into the tree

app/src/components/Layout/Notification.tsx

@@ -6,6 +6,7 @@ import { green, red } from '@material-ui/core/colors'
 
 interface Props {
   message?: string
+  type: 'error' | 'notification'
   onClose: () => void
   classes: any
 }
@@ -16,7 +17,7 @@ class Notification extends React.Component<Props, {}> {
   }
 
   public static styles = (theme: Theme) => ({
-    success: {
+    notification: {
       backgroundColor: green[600],
       color: theme.typography.button.color,
     },
@@ -40,7 +41,7 @@ class Notification extends React.Component<Props, {}> {
         onClose={this.props.onClose}
       >
         <SnackbarContent
-          className={this.props.classes.error}
+          className={this.props.type === 'error' ? this.props.classes.error : this.props.classes.notification}
           message={this.props.message}
         />
       </Snackbar>