Login popup is not going away after user logs in

[RFSH]

This bug is only reproducible in deployments that require login in all apps. To reproduce this:

• Open a recordset page in smite or other deployments that are not accessible to anonymous users and log in.
• Open a separate tab, and click "Log Out" on that page (or alternatively wait in the same tab until your session expires).
• In the first tab, change sort or initiate a page update. Chaise will prompt a login popup.
• After successfully logging in, Chaise does not refresh the page or hide the popup.

In this special scenario, Chaise will try to allow users to continue without refreshing the page. But since we couldn't reproduce it, we didn't fully implement it, and the code path abruptly ends without refreshing the page or hiding the popup.

Should we even attempt to continue with the page? or should we not bother and refresh like all the other scenarios?

[jrchudy]

This error was happening because the 401 handler we were attaching in ermrestJS wasn't being called properly. We were not passing a callback function to popupLogin() that would check whether the modal process succeeded or was canceled and would decide to call the appropriate callback functions originally supplied to modalLogin().