[gnome-mahjongg] Add translators comments.

[Arnaud B. <arnaudb src gnome org>]

commit 5b2db6f7b012d293cbe5f9655b72a4900fb1dbd1
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Oct 9 16:43:43 2020 +0200

    Add translators comments.

 data/help-overlay.ui | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/data/help-overlay.ui b/data/help-overlay.ui
index 2745116..61e7010 100644
--- a/data/help-overlay.ui
+++ b/data/help-overlay.ui
@@ -8,12 +8,14 @@
         <property name="visible">1</property>
         <child>
           <object class="GtkShortcutsGroup">
+            <!-- Translators: title of a section in the Keyboard Shortcuts window; contains "Start a new 
game", "Pause the game", "Undo"... -->
             <property name="title" translatable="yes" context="shortcut window">Main functions</property>
             <property name="visible">1</property>
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Ctrl&gt;N</property>
+                <!-- Translators: Ctrl-N shortcut description in the Keyboard Shortcuts dialog, section 
"Main functions"; discard current game and start a new one -->
                 <property name="title" translatable="yes" context="shortcut window">Start a new 
game</property>
               </object>
             </child>
@@ -21,6 +23,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Ctrl&gt;P Pause</property>
+                <!-- Translators: Ctrl-P (or Pause) shortcut description in the Keyboard Shortcuts dialog, 
section "Main functions"; pause the current game -->
                 <property name="title" translatable="yes" context="shortcut window">Pause the game</property>
               </object>
             </child>
@@ -28,6 +31,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Ctrl&gt;Z</property>
+                <!-- Translators: Ctrl-Z shortcut description in the Keyboard Shortcuts dialog, section 
"Main functions"; undo last move (if any) in the current game -->
                 <property name="title" translatable="yes" context="shortcut window">Undo</property>
               </object>
             </child>
@@ -35,6 +39,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Shift&gt;&lt;Ctrl&gt;Z</property>
+                <!-- Translators: Shift-Ctrl-Z shortcut description in the Keyboard Shortcuts dialog, 
section "Main functions"; redo last undone move (if any) in the current game -->
                 <property name="title" translatable="yes" context="shortcut window">Redo</property>
               </object>
             </child>
@@ -42,6 +47,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Ctrl&gt;H</property>
+                <!-- Translators: Ctrl-H shortcut description in the Keyboard Shortcuts dialog, section 
"Main functions"; highlight two matching tiles -->
                 <property name="title" translatable="yes" context="shortcut window">Show a hint</property>
               </object>
             </child>
@@ -49,12 +55,14 @@
         </child>
         <child>
           <object class="GtkShortcutsGroup">
+            <!-- Translators: title of a section in the Keyboard Shortcuts window; contains "Show Keyboard 
Shortcuts", "Show Help", "Quit"... -->
             <property name="title" translatable="yes" context="shortcut window">Generic</property>
             <property name="visible">1</property>
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Primary&gt;question</property>
+                <!-- Translators: Alt-? shortcut description in the Keyboard Shortcuts dialog, section 
"Generic"; show a window describing keyboard shortcuts -->
                 <property name="title" translatable="yes" context="shortcut window">Show Keyboard 
Shortcuts</property>
               </object>
             </child>
@@ -62,6 +70,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">F1</property>
+                <!-- Translators: F1 shortcut description in the Keyboard Shortcuts dialog, section 
"Generic"; open the application help -->
                 <property name="title" translatable="yes" context="shortcut window">Show Help</property>
               </object>
             </child>
@@ -69,6 +78,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">0</property> <!-- TODO implement? or not -->
                 <property name="accelerator">F11</property>
+                <!-- Translators: action of an unimplemented shortcut that would appear in the Keyboard 
Shortcuts dialog, section "Generic"; makes the window (un)fullscreen -->
                 <property name="title" translatable="yes" context="shortcut window">Fullscreen</property>
               </object>
             </child>
@@ -76,6 +86,7 @@
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
                 <property name="accelerator">&lt;Ctrl&gt;Q</property>
+                <!-- Translators: Ctrl-Q shortcut description in the Keyboard Shortcuts dialog, section 
"Generic"; close the window and quit application -->
                 <property name="title" translatable="yes" context="shortcut window">Quit</property>
               </object>
             </child>