A strange bug that one toastr showing on the screen... it should happen that when I click the toastr, it should be dismissed.
But it doesn't....
I was thinking `z-index` first... but later find out, it is about `pointer-events: none`
https://developer.mozilla.org/en-US/docs/Web/CSS/pointer-events
To solve the problem,
1. find where it adds `pointer-events: none`, change it to `pointer-events: auto`