[gnome-calendar] window: add "calendar-color-image" in calendar popover

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit d7e082af0ff129fef6ebd454acedd85415e6972e
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Jul 8 16:53:57 2016 -0300

    window: add "calendar-color-image" in calendar popover

 src/gcal-window.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/gcal-window.c b/src/gcal-window.c
index 507b631..d99c4cb 100644
--- a/src/gcal-window.c
+++ b/src/gcal-window.c
@@ -850,6 +850,8 @@ make_row_from_source (GcalWindow *window,
   pixbuf = get_circle_pixbuf_from_color (&color, 16);
   icon = gtk_image_new_from_pixbuf (pixbuf);
 
+  gtk_style_context_add_class (gtk_widget_get_style_context (icon), "calendar-color-image");
+
   /* source name label */
   label = gtk_label_new (e_source_get_display_name (source));
   gtk_label_set_xalign (GTK_LABEL (label), 0.0);