Do not emit the row-changed signal, but redraw the row for prelight.
Do not emit the row-changed signal, but redraw the row for prelight.

This basically undos commit 4bb221349c24515303fa14f9a580f955825b17d4
and fixes the code that was there before. Emitting the row-changed
signal causes any editing to be canceled.

sugarlabs/sugar-toolkit,gusDuarte/sugar-toolkit-gtk3,Daksh/sugar-toolkit-gtk3,puneetgkaur/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,quozl/sugar-toolkit-gtk3,godiard/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3,manuq/sugar-toolkit-gtk3,puneetgkaur/sugar-toolkit-gtk3,manuq/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit,tchx84/sugar-toolkit-gtk3,samdroid-apps/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,puneetgkaur/backup_sugar_sugartoolkit,gusDuarte/sugar-toolkit-gtk3,godiard/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit,tchx84/debian-pkg-sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,tchx84/debian-pkg-sugar-toolkit,sugarlabs/sugar-toolkit,tchx84/debian-pkg-sugar-toolkit,tchx84/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit,samdroid-apps/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit,quozl/sugar-toolkit-gtk3,puneetgkaur/backup_sugar_sugartoolkit,ceibal-tatu/sugar-toolkit,puneetgkaur/sugar-toolkit-gtk3,quozl/sugar-toolkit-gtk3,samdroid-apps/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,gusDuarte/sugar-toolkit-gtk3,manuq/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,Daksh/sugar-toolkit-gtk3,sugarlabs/sugar-toolkit-gtk3,gusDuarte/sugar-toolkit-gtk3,quozl/sugar-toolkit-gtk3,puneetgkaur/backup_sugar_sugartoolkit,godiard/sugar-toolkit-gtk3,samdroid-apps/sugar-toolkit-gtk3,Daksh/sugar-toolkit-gtk3,i5o/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit-gtk3,ceibal-tatu/sugar-toolkit,tchx84/sugar-toolkit-gtk3