(Minor) Bug - "New Transanction, Received" toasts - too many, don't go away

[sashafklein]

Just wanted to report a minor bug. When I've received DCR into my account, it shows up not as a single "toast", but as a large number, completely covering the vertical space of the screen. Because there's no way to dismiss them, and they cover the interface, I've had to restart the app to fix this.

This screenshot was taken after a few minutes, when some of the toasts finally disappeared, but for a while they linger on the screen. This is for a single transaction, so each toast is identical.

If there are some logs I can share, let me know.

[dschmierer]

https://github.com/decred/decrediton/issues/2545