Delete error alert flow could be improved

[gwyneplaine]

At the moment the delete error alert flow fails to do the following:

• Inform which items failed on deletion.
• Associate the failure to delete with the item that failed.

This is understandable, and ultimately a result of the fact that the current alert mechanism solely relies on toast notifications. The current implementation of toast notifications is not sufficient in solving for either of the issues outlined above, for two reasons:

• Limited space, so batching and displaying which items failed and why in a toast looks broken pretty quickly.

https://user-images.githubusercontent.com/12119389/129155736-ebe87cb7-54c3-4f4c-b6f7-97a08803711e.mov

• Adding many toasts (upwards of 25) is both computationally expensive and also a painful user experience.

All that said if we intend to address or solve for the issues with the deletion alert flow addressed above, I believe we'll need a UX pattern that doesn't exclusively lean on toast notifications.