Garbage textures are now created to a new texture before being rendered to screen.
This prevents tearing when scaling the windows in software render (and possible other modes).
PNG is the preferred raster format in XDG icon themes, with XPM
supported only for backward compatibility. Hence, convert the
application icons for the XDG icon theme to PNG.
The XPM icons were converted to PNG using 'convert', part of
ImageMagick.