Create a way to Open Pads with Opaque Background

[packardone]

It would be helpful if a variable could be used (or if the default could be changed) so that the "toggle transparent background" option is set to non-transparent by default.

The issue is that, with the background transparent, users think that they are drawing on the pad and that all users can see their drawings as they appear on the pad itself. By making the default opaque, the transparent ability would be retained, while making it clear that drawings are separate from and unconnected to the pad text.

[dvision1979]

+1 for this to be configurable. Thank you.