Flash banners persist too long

[kevinlinxc]

Steps to Reproduce

1. Sign in to Rubygems.org
2. Go to settings -> api keys
3. Enter the wrong password when prompted to verify with your password - this will bring up a banner/flash message
4. Enter the right password

Expected Behavior

You arrive on the API keys page without a banner saying you put in the wrong password

Current Behavior

You arrive on the API keys page with the banner persisting

I think the problem might be in many locations on the site, but this is the one I ran into just now.

Possible Solution

Clearing all banners might work? Other pages will want to let through some banners though, so maybe clearing errors if the cause of the error is gone. It could be pretty straightforward to clear error banners if the user logs in successfully.

Environment

Browser and its version: Chrome 103