[gnome-disk-utility] unlock dialog: Add a mnemonic to the keyfiles label

[Kai Lüke <kailueke src gnome org>]

commit 4826337d14bd7641c5c360d35711a755c069e08d
Author: segfault <segfault riseup net>
Date:   Wed Aug 28 00:40:46 2019 +0200

    unlock dialog: Add a mnemonic to the keyfiles label

 src/disks/ui/unlock-device-dialog.ui | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/disks/ui/unlock-device-dialog.ui b/src/disks/ui/unlock-device-dialog.ui
index 810b3154..7b5469b0 100644
--- a/src/disks/ui/unlock-device-dialog.ui
+++ b/src/disks/ui/unlock-device-dialog.ui
@@ -201,8 +201,9 @@
                 <property name="visible">False</property>
                 <property name="no_show_all">True</property>
                 <property name="can_focus">False</property>
-                <property name="label" translatable="yes">Keyfiles</property>
+                <property name="label" translatable="yes">_Keyfiles</property>
                 <property name="use_underline">True</property>
+                <property name="mnemonic_widget">unlock-device-tcrypt-keyfile-chooser-button</property>
                 <property name="xalign">1</property>
                 <style>
                   <class name="dim-label"/>