pdfExport exportDialog bbar buttons config doesn't propagate

[taauntik]

Forum post

Steps to reproduce:

Open official example: https://bryntum.com/products/gantt/examples/export/
Paste below code to the pdfExport object in Code editor

            exportDialog : {
                bbar : {
                    items : {
                        exportButton : { text : 'GO' }
                    }
                }
            }

Observe no change.

[matsbryntse]

This should be a config, not a prp

/**
             * When set to `true` labels in the dialog will say `Print` instead of `Export`
             * @prp {Boolean}
             */