custom action bug

I'm trying to add a button to custom action, but a new column is not added in the action, making the button overlap with the others.

```
settings = {
actions: {
custom: [
{
name: 'Button',
title: 'Button ',
}
],
},
columns: {
name: {
title: 'Full name'
},
email: {
title: 'Email'
},
lastLogin: {
title: 'Last Login'
}
}
};
```