added disabled option to tables and admin pages
apply disabled attribute to form elements
alter 'disabled' column to 'is_disabled'
update test with check on setting disabled
use format_string() instead of t() in tests
clean up debugging code
fix disabling for radios and checkboxes
remove debugging msg
update values help text
disabled elements are not removed, but included values are disabled
Merge branch 'feature/696-custom_search_disable_option' into develop
Tagging version 7.x-0.8
Merge branch 'release/7.x-0.8' into develop