R1:780e86acf83b

Herald Rule Creation Page: fix Back button in some cases

Summary:
If you want to create a new Herald Rule, sometime,
like for new "Object" Herald Rules, the Back button just
sends you to the very same page you already were.

The risk is that an employee could receive a specific
instruction, such as "Hey Alfreda, Go back, now"
and at this point Alfreda goes into an incredible loop
continuing to click the Back button until the duration
of the universe (since Phorge is so stable that it's able
to handle that…