Allow for Default Comments in Power Bi Report Server Paginated Report Subscriptions

[francino]

Allow for a default comment for Report Server Paginated Report subscriptions.

We use Power Bi Report Server to send paginated report subscriptions to our external customers.  Each subscription requires manual entry of the same message in the comments section.  To remove the possibility of our support team forgetting to put that comment in, it would be ideal to have the ability to set a default message to pre-populate in the Comment section.