The banner should pop out from the bottom of the tasks page for 6 seconds with the following message:
"Congrats on completing your task!" and next to it should be button with the text "Undo".
Clicking the button should restore the task back into the list.
The banner should pop out from the bottom of the tasks page for 6 seconds with the following message: "Congrats on completing your task!" and next to it should be button with the text "Undo". Clicking the button should restore the task back into the list.