Fix issue of blocked user seeing page protection instead of block message

A blocked user normally can't edit, so would hit the wbUserCanEdit
check in the js code and then see a page protection message, instead
of a message saying they are blocked.

Bug: 63607
Change-Id: I717f752e10dcab24d70c498734134d34b009d753
Merge "Fix issue of blocked user seeing page protection instead of block message"