[geary/wip/toolbar-tooltip-context] Add translation context to Compose Message toolbar tooltip

[Michael Gratton <mjog src gnome org>]

commit ba61ed3b8af75a7256465e77acd5c6d894475db5
Author: Michael Gratton <mike vee net>
Date:   Fri Feb 22 14:11:05 2019 +1100

    Add translation context to Compose Message toolbar tooltip

 ui/main-toolbar.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/ui/main-toolbar.ui b/ui/main-toolbar.ui
index 9dbc5c1b..8c128136 100644
--- a/ui/main-toolbar.ui
+++ b/ui/main-toolbar.ui
@@ -20,8 +20,8 @@
             <property name="can_focus">True</property>
             <property name="focus_on_click">False</property>
             <property name="receives_default">False</property>
+            <property name="tooltip_text" translatable="yes" context="tooltip">Compose Message</property>
             <property name="action_name">win.new-message</property>
-            <property name="tooltip_text" translatable="yes">Compose Message</property>
             <property name="always_show_image">True</property>
             <child>
               <object class="GtkImage" id="compose_new_message_image">