FOSS gamedev and creative worlds

Is it possible to add the Shift+Click feature to my stable version of the game (this time it is 0.4.12)?
If it is, how?

^^^ Feature request: Shift + Click inventory manipulation, Double-Click item stacking, Drag-Divide item placement. Is client inventory functionality done in C++ or Lua? Don't expect this in stable, Dragonop as 0.4.13 is now in feature freeze.

Shift click is in 0.4.13. The one the quickly moves from chest to inventory, etc?

Yes, the one that it's for doing the quick moves on the inv.
I'm asking if I can add this function manualy to the stable version.

It's a CPP feature, you'd need to compile it in.

Thanks