Translate child changed ATK signals to AT-SPI.
Translate child changed ATK signals to AT-SPI.

GNOME/at-spi2-core,GNOME/at-spi2-core,Distrotech/at-spi2-atk,Distrotech/at-spi2-atk,GNOME/at-spi2-atk,GNOME/at-spi2-core