[gnome-builder] todo: make treeview look-and-feel more like listbox

[Christian Hergert <chergert src gnome org>]

commit ddc2acd8805ba0216df1bb0d62c1db0c2ea89824
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jul 22 14:55:57 2017 -0700

    todo: make treeview look-and-feel more like listbox

 plugins/todo/gbp-todo-panel.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/todo/gbp-todo-panel.c b/plugins/todo/gbp-todo-panel.c
index c0e8e5c..456b697 100644
--- a/plugins/todo/gbp-todo-panel.c
+++ b/plugins/todo/gbp-todo-panel.c
@@ -301,6 +301,7 @@ gbp_todo_panel_init (GbpTodoPanel *self)
                             "query-tooltip",
                             G_CALLBACK (gbp_todo_panel_query_tooltip),
                             self);
+  dzl_gtk_widget_add_style_class (GTK_WIDGET (self->tree_view), "i-wanna-be-listbox");
   gtk_container_add (GTK_CONTAINER (scroller), GTK_WIDGET (self->tree_view));
 
   selection = gtk_tree_view_get_selection (self->tree_view);