Updated notify list cell rendering to apply GTK3 RGBA foreground properties and free boxed colors correctly while keeping GTK2 behavior intact.

Switched user list and DCC tree view text columns to select the GTK3 foreground-rgba property (with GTK2 fallbacks) for cell renderer text colors.
Reused RGBA parsing for palette-backed color chooser defaults and clarified palette change tracking comments.

src/fe-gtk/userlistgui.c

@@ -533,6 +533,11 @@ static void
 userlist_add_columns (GtkTreeView * treeview)
 {
 	GtkCellRenderer *renderer;
+#if GTK_CHECK_VERSION(3,0,0)
+	const char *foreground_property = "foreground-rgba";
+#else
+	const char *foreground_property = "foreground-gdk";
+#endif
 
 	/* icon column */
 	renderer = gtk_cell_renderer_pixbuf_new ();
@@ -549,7 +554,7 @@ userlist_add_columns (GtkTreeView * treeview)
 	gtk_cell_renderer_text_set_fixed_height_from_font (GTK_CELL_RENDERER_TEXT (renderer), 1);
 	gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
 																-1, NULL, renderer,
-													"text", 1, PALETTE_FOREGROUND_PROPERTY, 4, NULL);
+													"text", 1, foreground_property, 4, NULL);
 
 	if (prefs.hex_gui_ulist_show_hosts)
 	{