[gtk+/gtk-3-22] SidebarRow: Add Unmount tooltip to eject_button

[Daniel Boles <dboles src gnome org>]

commit 0969419610b5702c6743aef1636769b32dcfbd9f
Author: Daniel Boles <dboles src gnome org>
Date:   Sat Aug 19 17:18:35 2017 +0100

    SidebarRow: Add Unmount tooltip to eject_button
    
    It was reported that the lack of a tooltip made its purpose unclear.
    This can be solved by just copying PlacesViewRow’s eject_button tooltip.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766909

 gtk/ui/gtksidebarrow.ui |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/ui/gtksidebarrow.ui b/gtk/ui/gtksidebarrow.ui
index 112c01a..05d10ee 100644
--- a/gtk/ui/gtksidebarrow.ui
+++ b/gtk/ui/gtksidebarrow.ui
@@ -46,6 +46,7 @@
                     <property name="valign">center</property>
                     <property name="margin-start">4px</property>
                     <property name="no-show-all">1</property>
+                    <property name="tooltip-text" translatable="yes">Unmount</property>
                     <child>
                       <object class="GtkImage">
                         <property name="visible">1</property>