On slower systems it may take more than 4 seconds for the
stataus message to dissapear from the DOM, so it's better
to wait for the default duration of 30 seconds before
proceeding.
Thanks to @Riken-Shah for suggesting the fix.
The browser seems to autofill the `Name` field of the add-playground
form. Most likely this behavior is a result of value of the `name`
input field being `name`, causing the browser do to something weird
here. This name is now changed to `playground_name`.