Currently (up to V7.1) a user must (if "always prompt" is checked)
1. choose or enter the values for the report options by mouse or keyboard and
2. start the report generation by a mouse click on the apply button.
AFAIK there's no keyboard-shortcut and there's no HTML-like solution as with <form>...<button type="submit" .../>...</form> which assigns the Enter-key to this button field.
Any solution would increase the usability:
* Use the (hard-coded) Enter-key as with type="submit" or
* Use a configurable key assignment, e.g. Ctrl-Enter.
The configurable key option would increase the flexibility, too, to adopt the solution to different environments, where Enter might not be the appropriate key (for whatever reason)
Thank you for implementing this feature request!