Add back page_locked template context variable
Add back page_locked template context variable

This is used by edit.html to lock the fields

mixxorz/wagtail,mixxorz/wagtail,FlipperPA/wagtail,jnns/wagtail,zerolab/wagtail,torchbox/wagtail,zerolab/wagtail,torchbox/wagtail,jnns/wagtail,gasman/wagtail,FlipperPA/wagtail,wagtail/wagtail,zerolab/wagtail,rsalmaso/wagtail,wagtail/wagtail,torchbox/wagtail,wagtail/wagtail,wagtail/wagtail,rsalmaso/wagtail,jnns/wagtail,rsalmaso/wagtail,timorieber/wagtail,mixxorz/wagtail,rsalmaso/wagtail,takeflight/wagtail,gasman/wagtail,mixxorz/wagtail,kaedroho/wagtail,gasman/wagtail,kaedroho/wagtail,thenewguy/wagtail,thenewguy/wagtail,thenewguy/wagtail,zerolab/wagtail,FlipperPA/wagtail,kaedroho/wagtail,jnns/wagtail,takeflight/wagtail,gasman/wagtail,thenewguy/wagtail,timorieber/wagtail,timorieber/wagtail,FlipperPA/wagtail,rsalmaso/wagtail,timorieber/wagtail,takeflight/wagtail,kaedroho/wagtail,thenewguy/wagtail,kaedroho/wagtail,wagtail/wagtail,gasman/wagtail,takeflight/wagtail,mixxorz/wagtail,torchbox/wagtail,zerolab/wagtail