[geary] Make unread/read shortcut help text same for Ctrl & single keys

[Michael Gratton <mjog src gnome org>]

commit 93acc9333004252598820dfb0a2cc8c64258530f
Author: Michael Gratton <mike vee net>
Date:   Wed Aug 21 21:13:02 2019 +1000

    Make unread/read shortcut help text same for Ctrl & single keys
    
    See https://mail.gnome.org/archives/gnome-i18n/2019-August/msg00022.html

 ui/gtk/help-overlay.ui | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/ui/gtk/help-overlay.ui b/ui/gtk/help-overlay.ui
index 7ed647d0..4b539ed2 100644
--- a/ui/gtk/help-overlay.ui
+++ b/ui/gtk/help-overlay.ui
@@ -293,8 +293,8 @@
                         <child>
                             <object class="GtkShortcutsShortcut">
                                 <property name="visible">True</property>
-                                <property name="title" translatable="yes" context="shortcut 
window">Mark/un-mark read</property>
-                                <property name="accelerator">&lt;Shift&gt;I &lt;Shift&gt;U</property>
+                                <property name="title" translatable="yes" context="shortcut 
window">Un-mark/mark read</property>
+                                <property name="accelerator">&lt;Shift&gt;U &lt;Shift&gt;I</property>
                             </object>
                         </child>
                         <child>