Allow rft.source as input for GES availability rules
Right now, when constructing the service availability rules for a GES, the dropdown menu for the input parameters includes rft.SOURCE and rfe.SOURCE. However, when I attempted to use this, it didn't behave as expected. I did further testing and found this is not currently functional: I set rules to show a link when the rft.SOURCE is empty, and it always showed up. The same happened with rfe.SOURCE.
This would be helpful, as it would allow us to configure links to only show up for PCI records, or only for Alma records. Especially in environments where you'd like to route users only to resource sharing or only to ILL as appropriate, this would be very useful.