ISTWCMS-6195 Refactor generic nolink/button link field function in uw_cfg_common.module

Lily Yanrequested to merge
feature/ISTWCMS-6195-l26yan-Remove-support-for-nolink-and-button-in-all-link-fields into 1.1.x

ISTWCMS-6195 Refactor generic nolink/button link field function in uw_cfg_common.module

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