Spending limit notification is too sticky

[jldec]

Following up from #12467

The observed behavior now (at least in the preview environment I tested) is that once the spending limit notification become visible, it does not go away until dismissed (by clicking on the X). This happens even if the user navigates to another page, or the page is refreshed, or the user logs out and in again.

This is problematic especially after user has managed to get the spending limit increased or changes to a different billing account whose spending limit has not been reached yet.

[AlexTugarev]

Resuming work on this.