Fix #1422265 - Clear the tool layer when the freefrom shape tool is done.
Fix #1422265 - Clear the tool layer when the freefrom shape tool is done.

jakeclawson/Pinta,PintaProject/Pinta,Fenex/Pinta,Mailaender/Pinta,PintaProject/Pinta,jakeclawson/Pinta,Fenex/Pinta,PintaProject/Pinta,Mailaender/Pinta