silverstripe/silverstripe-framework — pull request #3013 by chillu (2014-04-07 23:29:15+00:00)
Title: Prevent IE errors on hidden login forms

In order to focus a field, it needs to be visible,
which can't be guaranteed on a core level by the login form JavaScript.
Optionally check for visibility via jQuery if it exists,
and allow explicit disabling of this behaviour via a unique identifier.