Fix projection paint clone/soften/smear no longer working with textures,

Moved the code after the masking check so we can skip the texture lookup
if the pixel is done, is a bit faster. Also hide the color wheel for these
tools, only did it for 2D paint in previous commit.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@56432 954f8c5b-7b00-dc11-b283-0030488c597c