UI suggestion : Test Patterns, Color balance, and Dehalo

[pierrelabreche]

Consider these suggestions :

• Moving Test Patterns, currently available in the Transformations main menu, to the File main menu following File/New --Test Patterns are not really transformations, since they generate a top-level image on a new image tree root
• Moving Transformation/Gray/Dehalo to Transformation/Sharpen/Dehalo -- this will make the transformation easier to find as it is used for sharpening correction
• Renaming Color/Multi Color Balance to Color/Balance Multi -- collocates in the menu tree the two color balancing methods ( Color/Balance and Color/Balance Multi )