Fix checkboxes appearing as always checked in Windows high contrast mode
Fix checkboxes appearing as always checked in Windows high contrast mode

torchbox/wagtail,rsalmaso/wagtail,wagtail/wagtail,rsalmaso/wagtail,thenewguy/wagtail,zerolab/wagtail,zerolab/wagtail,torchbox/wagtail,zerolab/wagtail,wagtail/wagtail,jnns/wagtail,thenewguy/wagtail,rsalmaso/wagtail,jnns/wagtail,zerolab/wagtail,wagtail/wagtail,mixxorz/wagtail,torchbox/wagtail,wagtail/wagtail,mixxorz/wagtail,torchbox/wagtail,jnns/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,zerolab/wagtail,wagtail/wagtail,mixxorz/wagtail,thenewguy/wagtail,mixxorz/wagtail,thenewguy/wagtail,jnns/wagtail,mixxorz/wagtail,thenewguy/wagtail