Rename formname to group to be more relevant.

Signed-off-by: Hendra Uzia <hendra.uzia@yahoo.co.id>
Remove table settings.

Signed-off-by: Hendra Uzia <hendra.uzia@yahoo.co.id>
Refactor value & title parameter in javascript.

Signed-off-by: Hendra Uzia <hendra.uzia@yahoo.co.id>
Fix level 3 dropdown reset.

Signed-off-by: Hendra Uzia <hendra.uzia@yahoo.co.id>
Fix level 1 dropdown data retrieval.

Signed-off-by: Hendra Uzia <hendra.uzia@yahoo.co.id>
Refactor dropdown generation.

- Refactor dropdown generation to be simpler.
- Change dropdown generation in example.
- Remove irrelevant example.
- Edit dropdown example in readme.

Signed-off-by: Hendra Uzia <hendra.uzia@yahoo.co.id>