@Pecan
Maybe I understood wrong...
As Alpha posted, that behavior is already implemented since c::b 13.12 by the core application... so it should already work the same under windows and linux since then...
The described functionality is exactly to copy some text, or to just mark it, and then paste that text by middle mouse button where ever you click. So that would be the same behavior that you described for mouse sap. Does mouse sap do anything else besides that? Am I missing something, maybe?
Greetings
PS: and yes, someone using a version of c::b prior to 13.12 under windows would still have use for the mouse sap plugin...