Prevent logging of an error when re-removing TOPIC_SHUTDOWN obs

git-svn-id: https://code.downthemall.net/repos/trunk@3608 43940e1f-b481-bb45-89eb-5c6a4bf3d40a
Fix bogus comparision

git-svn-id: https://code.downthemall.net/repos/trunk@3609 43940e1f-b481-bb45-89eb-5c6a4bf3d40a
Next stab at #2450

window.location is not actually a string. Either use == or .toString()
===. Opted for the latter to make jshint happy.

git-svn-id: https://code.downthemall.net/repos/trunk@3610 43940e1f-b481-bb45-89eb-5c6a4bf3d40a