Added possibility to change Field ID in Contentful (#186)#187

Rafał Pietrzak (wlasnapl) wants to merge 1 commit intocontentful:mastercontentful/contentful-management.php:masterfrom

wlasnapl:fix/186-missing-possibility-to-change-field-idwlasnapl/contentful-management.php:fix/186-missing-possibility-to-change-field-idCopy head branch name to clipboard