Remove optimization to only clear ToolLayer when it has been changed by the edit engine, because it might have been changed by another tool.  Fortunately Clear should be a relatively cheap operation.
Remove optimization to only clear ToolLayer when it has been changed by the edit engine, because it might have been changed by another tool.  Fortunately Clear should be a relatively cheap operation.

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