2x2 deforming mesh for patch tool

[kirk23]

And flip x , flip Y  . would be so much helpful  allowing to match the patch to  underlying image more precisely.  I believe it should be an easy to do feature.  

Another improvements  could be ability to have the patch source from other document    and ability to patch alpha /transparency same way it works on RGB  . I mean not adding to existing  transparency but rather replacing it. As an option.