Add support for parameters on customer and patient Forms.
When created, values for these parameters would be prompted for, and saved with the Form.
When generating PDF or printing the Forms, the parameters would be populated automatically from the saved values.
This would allow Forms to be used in place of Letters where no long term storage is required and:
* reduce the storage requirement of documents;
* allow templates to change, while preserving the input content


Editing of parameters post creation would need to be supported, subject to record locking.

As with the Letter parameter prompting, Forms that use JRXML templates, can have boolean, string, integer, float or date parameters. For Forms that use .ODT, parameters are limited to strings.