Toast triggered while another one shows is dismissing the old toast and itself

[ovitrif]

Description

The last tweak for toasts UI/UX would be to dismiss towards the swiped direction, right now it always animates towards the top.

But this more in scope for another PR which should mainly fix the animation in case of multiple toasts, ie.; Get rid of the auto-dismiss mid-transition which cancels both toasts when a new toast is triggered while an old one is showing.

Recording

transitionsIssues.mp4

Originally posted by @ovitrif in #500 (review)