[release-1.3] Refers to #666 fix for IE<10 login problems

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | -
| Fixed tickets | -
| Refs tickets  | #666
| License       | MIT
| Doc PR        | -

This fixes the problem that hte login window in IE<10 is broken when you switch on generating template comments into the output.

The issue is described clearly in the #666 ticket.