Improve inPaint

Adding this here as requested by support. Most important Improve inpaint output.Eg in attached example, all I wanted was a vertical, near black, wall changed to blue tiles. Less important but would be helpful Inpaint needs a Ctrl Z to undo the last brush stroke VS clear all brush strokes Inpaint needs a way to change brush size for small areas, as the AI has difficulty in understanding that some brush strokes touch areas that should not be changed.