[gnome-calendar] window: add tooltips to header buttons

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

commit b56540a8d75a1fc6b51258f52941d40884a303ae
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Jul 15 21:26:50 2015 -0300

    window: add tooltips to header buttons
    
    In the case the user have any doubts about each
    button, a nice tooltip shows and enlightens one's
    mind.

 data/ui/window.ui |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/window.ui b/data/ui/window.ui
index 756eebc..1926dd0 100644
--- a/data/ui/window.ui
+++ b/data/ui/window.ui
@@ -247,6 +247,7 @@
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
             <property name="popover">calendar_popover</property>
+            <property name="tooltip_text" translatable="true">Manage your calendars</property>
             <child>
               <object class="GtkImage" id="calendars_button_image">
                 <property name="visible">True</property>
@@ -263,6 +264,7 @@
             <property name="visible">True</property>
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
+            <property name="tooltip_text" translatable="true">Search for events</property>
             <child>
               <object class="GtkImage" id="search_button_image">
                 <property name="visible">True</property>