[gnome-calendar: 1/2] window: add org-gnome-Calendar style class

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

commit 868e0de889acfaa6831271cbd329e19cd606053d
Author: alex285 <alexis diavatis hotmail com>
Date:   Thu Dec 7 02:53:42 2017 +0000

    window: add org-gnome-Calendar style class
    
    Currently there is no way for a theme to add some specific styles (eg colors) on Calendar widgets, 
without upstreaming their CSS.
    This commit adds the org-gnome-Calendar CSS class on the main window, as a helper selector. (See bug #227)

 data/ui/window.ui | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/data/ui/window.ui b/data/ui/window.ui
index 0acb8c0b..7afb0dc1 100644
--- a/data/ui/window.ui
+++ b/data/ui/window.ui
@@ -10,6 +10,9 @@
     <signal name="key-press-event" handler="key_pressed" object="GcalWindow" swapped="no"/>
     <signal name="window-state-event" handler="window_state_changed" object="GcalWindow" swapped="no"/>
     <property name="active-date" bind-source="search_view" bind-property="active-date" 
bind-flags="default|sync-create"/>
+    <style>
+      <class name="org-gnome-Calendar"/>
+    </style>    
     <child>
       <object class="GtkOverlay" id="views_overlay">
         <property name="visible">True</property>