[gnome-disk-utility] Add more missing tooltips

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 3671504adc8d616d6c5b10694970c8757fdc0d41
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Aug 22 19:56:26 2015 -0500

    Add more missing tooltips
    
    https://bugzilla.gnome.org/show_bug.cgi?id=738150

 src/disks/gduwindow.c |    3 +++
 src/disks/ui/disks.ui |    2 ++
 2 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/disks/gduwindow.c b/src/disks/gduwindow.c
index 7245776..7d39f55 100644
--- a/src/disks/gduwindow.c
+++ b/src/disks/gduwindow.c
@@ -955,16 +955,19 @@ create_header (GduWindow *window)
   button = window->devtab_drive_power_off_button = gtk_button_new ();
   image = gtk_image_new_from_icon_name ("system-shutdown-symbolic", GTK_ICON_SIZE_MENU);
   gtk_button_set_image (GTK_BUTTON (button), image);
+  gtk_widget_set_tooltip_text (button, _("Power off this disk"));
   gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
 
   button = window->devtab_drive_eject_button = gtk_button_new ();
   image = gtk_image_new_from_icon_name ("media-eject-symbolic", GTK_ICON_SIZE_MENU);
   gtk_button_set_image (GTK_BUTTON (button), image);
+  gtk_widget_set_tooltip_text (button, _("Eject this disk"));
   gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
 
   button = window->devtab_drive_loop_detach_button = gtk_button_new ();
   image = gtk_image_new_from_icon_name ("list-remove-symbolic", GTK_ICON_SIZE_MENU);
   gtk_button_set_image (GTK_BUTTON (button), image);
+  gtk_widget_set_tooltip_text (button, _("Detach this loop device"));
   gtk_header_bar_pack_end (GTK_HEADER_BAR (header), button);
 
   return header;
diff --git a/src/disks/ui/disks.ui b/src/disks/ui/disks.ui
index 2054bde..d0b4144 100644
--- a/src/disks/ui/disks.ui
+++ b/src/disks/ui/disks.ui
@@ -740,6 +740,7 @@
                                         <property name="visible">True</property>
                                         <property name="can_focus">False</property>
                                         <property name="use_underline">True</property>
+                                        <property name="tooltip_text" translatable="yes">Unlock selected 
encrypted partition</property>
                                         <property name="icon_name">changes-allow-symbolic</property>
                                       </object>
                                       <packing>
@@ -752,6 +753,7 @@
                                         <property name="visible">True</property>
                                         <property name="can_focus">False</property>
                                         <property name="use_underline">True</property>
+                                        <property name="tooltip_text" translatable="yes">Lock selected 
encrypted partition</property>
                                         <property name="icon_name">changes-prevent-symbolic</property>
                                       </object>
                                       <packing>