When you say the reference icon, do you mean the magnifying glass? Just wondering what you want to do with it as it's used to select a different value to enter into the field, if it's read-only then do you just want to be taken to the list of records in that referenced fields table? If that is the case you could probably do it with a custom icon/ui macro and add it via field_decorations and not modify the magnifying glass in any way as by default it would try to populate that field if you use that.
Then you could copy a UI Macro such as 'show_related_tasks' and use that to be transformed to the list of records on that table?
| field_decorations | UI Macro name list, separated by semicolons (";") | most fields | Similar to ref_contributions, causes the named UI Macro to be invoked when the field is rendered on a form. |
