Trigger condition: Field contains word or string for custom text fields

We use open text custom fields on our tickets. These involve listing the product that the ticket is related about in a text custom field, and it would be incredibly helpful to have a trigger condition similar to the one available around comments text or subject text where we can have the trigger run if a string or a word is detected within this text custom field. 

Request: Trigger condition custom text field “contains string” or has one of these words"

Similar to the condition available for comment text or subject text, but replicated for custom text fields on tickets

Other users mentioned it here: https://support.zendesk.com/hc/en-us/community/posts/4409222715034-Adding-the-same-functionality-as-the-trigger-condition-of-subject-to-a-custom-field-text