Add "NULL" in Conditional Formatting

When conditional formatting using a "Select" field, and field option
"Allow Null" is true, create a conditional formatting option of "NULL".
Merge pull request #216 from gmcmicken/master

Add "NULL" in Conditional Formatting
Minor fix for NULL conditional logic

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Added translation support for previous commit

Signed-off-by: Elliot Condon <e@elliotcondon.com>
minor duplicate field improvements

Signed-off-by: Elliot Condon <e@elliotcondon.com>
"Select" field ajax search case-insensitive

Field "Select" with option "Use AJAX ..." allows user to search a list
of choices. Changed behaviour from case-sensitive to case-insensitive,
as typically users do not capitalize while using an auto-complete style
search.
Merge pull request #221 from gmcmicken/master

"Select" field ajax search case-insensitive
Fixed minor bug preventing sub field width to appear on newly created repeater field

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Minor improvements for editing / adding sub fields

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Fixed radio field not saving new choices

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Improved sub field column_width logic

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Removed ancestors and field group from $field to improve load speed

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Fixed WPML issue with local .json files

https://github.com/AdvancedCustomFields/acf5-beta/issues/222
Signed-off-by: Elliot Condon <e@elliotcondon.com>
Prevent (copy) being added to field group name when duplicating in WPML

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Added compatibility with ACF_LITE

https://github.com/AdvancedCustomFields/acf5-beta/issues/224
Signed-off-by: Elliot Condon <e@elliotcondon.com>
Fixed gallery field title order

Signed-off-by: Elliot Condon <e@elliotcondon.com>
Merge remote-tracking branch 'upstream/master'