Unable to "reset" wrong admin password

If logged in as a normal user, going to a "store" and selecting a plugin to install prompts for an admin user/password. If a wrong password is entered, there is no way to "fix" this. Even after logging out and logging again, choosing a plugin to install simply drops an error toast "invalid username/password". Starting a new tab results in the same. In fact there seems no obvious way to trigger a new dialog to fix the incorrect password.

Actually I have not been able to trigger the dialog at all. Hard tab reload. Log out. Open a new browser window. Nothing. I had to open a completely different browser.

Expected behavior: If there is an invalid login attempt, pop open the credentialling dialog again.

Start by reproducing the plugin-install flow in the ChRIS UI as a normal user, enter invalid administrator credentials, and observe what happens after the error toast. Trace the credential dialog and retry behavior from that flow. Done means a subsequent install attempt reliably reopens the credential dialog after an invalid login.

Written by the indexing model from the issue text.