[gnome-calculator] Added mnemonics for primary menu items (#113)

[Robert Roth <robertroth src gnome org>]

commit 01c754c0c389f075b1c38db2f84f38259873a54e
Author: Robert Roth <robert roth off gmail com>
Date:   Mon May 27 10:14:34 2019 +0300

    Added mnemonics for primary menu items (#113)

 src/math-window.ui | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/math-window.ui b/src/math-window.ui
index 8c7b5e6c..2b3f3af6 100644
--- a/src/math-window.ui
+++ b/src/math-window.ui
@@ -46,7 +46,7 @@
   <menu id="primary_menu">
     <section>
       <item>
-        <attribute name="label" translatable="yes">New Window</attribute>
+        <attribute name="label" translatable="yes">_New Window</attribute>
         <attribute name="action">app.new-window</attribute>
         <attribute name="accel">&lt;Primary&gt;n</attribute>
       </item>
@@ -54,7 +54,7 @@
     <section>
       <attribute name="id">help-section</attribute>
       <item>
-        <attribute name="label" translatable="yes">Preferences</attribute>
+        <attribute name="label" translatable="yes">_Preferences</attribute>
         <attribute name="action">app.preferences</attribute>
       </item>
       <item>
@@ -63,12 +63,12 @@
         <attribute name="accel">&lt;Primary&gt;question</attribute>
       </item>
       <item>
-        <attribute name="label" translatable="yes">Help</attribute>
+        <attribute name="label" translatable="yes">_Help</attribute>
         <attribute name="action">app.help</attribute>
         <attribute name="accel">F1</attribute>
       </item>
       <item>
-        <attribute name="label" translatable="yes">About Calculator</attribute>
+        <attribute name="label" translatable="yes">_About Calculator</attribute>
         <attribute name="action">app.about</attribute>
       </item>
     </section>