[gnome-system-monitor/libreajans/gnome-system-monitor-helpoverlay] Show keyboard shortcuts window (fixes #65)

[Robert Roth <robertroth src gnome org>]

commit b69c950d7836111978bf35b3049b09090feea5bf
Author: Robert Roth <robert roth off gmail com>
Date:   Wed Nov 4 20:15:16 2020 +0200

    Show keyboard shortcuts window (fixes #65)

 data/menus.ui     | 4 ++++
 src/interface.cpp | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/data/menus.ui b/data/menus.ui
index 534765cb..9933d5e8 100644
--- a/data/menus.ui
+++ b/data/menus.ui
@@ -16,6 +16,10 @@
         <attribute name="label" translatable="yes">Help</attribute>
         <attribute name="action">app.help</attribute>
       </item>
+      <item>
+        <attribute name="label" translatable="yes">Keyboard Shortcuts</attribute>
+        <attribute name="action">win.show-help-overlay</attribute>
+      </item>
       <item>
         <attribute name="label" translatable="yes">About System Monitor</attribute>
         <attribute name="action">win.about</attribute>
diff --git a/src/interface.cpp b/src/interface.cpp
index b5e38b3a..169e1566 100644
--- a/src/interface.cpp
+++ b/src/interface.cpp
@@ -730,6 +730,7 @@ create_main_window (GsmApplication *app)
 
     GActionEntry win_action_entries[] = {
         { "about", on_activate_about, NULL, NULL, NULL },
+        { "show-help-overlay", on_activate_keyboard_shortcuts,  NULL, NULL, NULL},
         { "search", on_activate_search, "b", "false", NULL },
         { "send-signal-stop", on_activate_send_signal, "i", NULL, NULL },
         { "send-signal-cont", on_activate_send_signal, "i", NULL, NULL },
@@ -738,7 +739,6 @@ create_main_window (GsmApplication *app)
         { "priority", on_activate_priority, "i", "@i 0", change_priority_state },
         { "memory-maps", on_activate_memory_maps, NULL, NULL, NULL },
         { "open-files", on_activate_open_files, NULL, NULL, NULL },
-        { "show-help-overlay", on_activate_keyboard_shortcuts, NULL, NULL, NULL },
         { "process-properties", on_activate_process_properties, NULL, NULL, NULL },
         { "refresh", on_activate_refresh, NULL, NULL, NULL },
         { "show-page", on_activate_radio, "s", "'resources'", change_show_page_state },