* libgimpwidgets/images/gimp-button.png
* libgimpwidgets/images/gimp-chain-button.png
* libgimpwidgets/images/gimp-color-area.png
* libgimpwidgets/images/gimp-color-button.png
* libgimpwidgets/images/gimp-color-hex-entry.png
* libgimpwidgets/images/gimp-color-scale.png
* libgimpwidgets/images/gimp-file-entry.png: updated.