* add a custom-color background pattern
* add lots of nice patters (copy from MyPaint?)
* add solid-color background patterns and use a categorized view for them
* allow non 64x64 pattern tiles
* enable Add, Remove, Reset buttons
* integrate with custom image widget
* integrate with image properties
* label the background patterns somehow 
* loading/saving of KisImage
* set pattern on double click
* show currently selected background in the iconview
