Broken filters

[Manuel "MrBeast" Riecke]

Here is a list of broken filters boud asked for.

Broken:
 - Color Transfer (No effect)
 - Edge Detection (Unexpected result)
   -> Sobel (Preview correct but with artifacts, end result incorrect)
 - Emboss (Unexpected result)
   -> With Variable Depth (Heavy artifacts)
 - Bumpmap (No effect)
 - Phong Bumpmap (Confusing basic preset, artifacts at tile borders)

Preview artifacts (e.g. end result is fine):
 - Map
   -> Small Tiles
   -> Round Corners
 - Other
   -> Wave
   -> Random Pick

Unsure if working:
 - Enchant
   -> Gaussian Noise Reduction (Little to no effect)