GtkTreeView odd/even row styling no longer works

Submitted by Sam Parkinson @sam

Assigned to gtk..@..tk.org

Link to original bug (#757495)

Description

As of Gtk 3.18, rows could be styled to be different colours if the were odd or even using something along the lines of:

GtkTreeView row:even {                                                                     
    background-color: @row_even;                                                
}                                                                               
                                                                            
GtkTreeView row:odd {                                                                     
    background-color: @row_odd;                                                 
}

However, this seems to have been removed in 3.19.1, as the rows are not effected by these colors.

Adding the other css does not effect it either:

-GtkTreeView-odd-row-color: @row_odd;
-GtkTreeView-even-row-color: @row_even;

Downstrea: https://bugs.sugarlabs.org/ticket/4908

Version: 3.19.x