[Enhancement] Form resubmit without a login page

### Search before asking

- [x] I had searched in the [issues](https://github.com/apache/shiro/issues?q=is%3Aissue) and found no similar issues.

### Enhancement Request

Currently, Shiro will resubmit forms upon session timeout and subsequent re-login.
However, when login page and/or flow is not configured, it would be nice to have form resubmitted as well, even without the "session expired" screen

### Describe the solution you'd like

Hook into session expired flow and resubmit form there, instead of just doing it after login succeeded.
May require some configuration to be able to disable this behavior, if necessary.

### Are you willing to submit PR?

- [x] Yes I am willing to submit a PR!