[Summary]: add keybindings Cmd-h (hide application) for mac

Conflicts:
	gtk2_ardour/ardour_ui.cc
	gtk2_ardour/ardour_ui.h
	gtk2_ardour/ardour_ui_ed.cc

gtk2_ardour/ardour_ui.cc

@@ -4865,3 +4865,9 @@ ARDOUR_UI::audioengine_became_silent ()
 		break;
 	}
 }
+	
+void
+ARDOUR_UI::hide_application ()
+{
+    Application::instance ()-> hide ();
+}

gtk2_ardour/ardour_ui.h

@@ -308,6 +308,7 @@ class ARDOUR_UI : public Gtkmm2ext::UI, public ARDOUR::SessionHandlePtr
 
         int disconnect_from_engine ();
         int reconnect_to_engine ();
+	void hide_application ();
 
   protected:
 	friend class PublicEditor;

gtk2_ardour/ardour_ui_ed.cc

@@ -190,6 +190,7 @@ ARDOUR_UI::install_actions ()
 
 	common_actions = ActionGroup::create (X_("Common"));
 	ActionManager::register_action (common_actions, X_("Quit"), _("Quit"), (hide_return (sigc::mem_fun(*this, &ARDOUR_UI::finish))));
+	ActionManager::register_action (common_actions, X_("Hide"), _("Hide"), sigc::mem_fun (*this, &ARDOUR_UI::hide_application));
 
 	/* windows visibility actions */
 

gtk2_ardour/mnemonic-us.bindings.in

@@ -139,6 +139,7 @@ This mode provides many different operations on both regions and control points,
 ;; TOP ROW
 
 @sess|Common/Quit|<@PRIMARY@>q|quit
+@sess|Common/Hide|<@PRIMARY@>h|hide
 @movp|Editor/jump-forward-to-mark|w|to next mark
 @movp|Editor/jump-backward-to-mark|q|to previous mark
 

libs/gtkmm2ext/application.cc

@@ -58,6 +58,12 @@ Application::ready ()
 	gtk_application_ready ();
 }
 
+void
+Application::hide ()
+{
+    gtk_application_hide ();
+}
+
 void
 Application::cleanup ()
 {

libs/gtkmm2ext/gtkapplication_quartz.mm

@@ -1221,7 +1221,7 @@ create_apple_menu ()
 	[menuitem release];
 	[_app_menu addItem: [NSMenuItem separatorItem]];
 	menuitem = [[NSMenuItem alloc] initWithTitle:@"Hide"
-		    action:@selector(hide:) keyEquivalent:@""];
+		    action:@selector(hide:) keyEquivalent:@"h"];
 	[menuitem setTarget: NSApp];
 	[_app_menu addItem: menuitem];
 	[menuitem release];
@@ -1476,6 +1476,12 @@ gtk_application_ready ()
         [[NSApplication sharedApplication] activateIgnoringOtherApps : YES];
 }
 
+extern "C" void
+gtk_application_hide ()
+{
+    [NSApp performSelector:@selector(hide:)];
+}
+
 extern "C" void
 gtk_application_cleanup()
 {

libs/gtkmm2ext/gtkapplication_win32.c

@@ -47,3 +47,8 @@ void
 gtk_application_ready (void)
 {
 }
+
+void
+gtk_application_hide (void)
+{
+}

libs/gtkmm2ext/gtkapplication_x11.c

@@ -50,3 +50,8 @@ void
 gtk_application_ready (void)
 {
 }
+
+void
+gtk_application_hide (void)
+{
+}

libs/gtkmm2ext/gtkmm2ext/application.h

@@ -45,6 +45,7 @@ public:
     ~Application ();
 
     void                     ready ();
+    void                     hide ();
     void                     cleanup ();
     void                     set_menu_bar (Gtk::MenuShell&);
     GtkApplicationMenuGroup* add_app_menu_group ();

libs/gtkmm2ext/gtkmm2ext/gtkapplication.h

@@ -34,6 +34,7 @@ typedef struct _GtkApplicationMenuGroup GtkApplicationMenuGroup;
 
 LIBGTKMM2EXT_API int  gtk_application_init (void);
 LIBGTKMM2EXT_API void gtk_application_ready (void);
+LIBGTKMM2EXT_API void gtk_application_hide (void);
 LIBGTKMM2EXT_API void gtk_application_cleanup (void);
 
 LIBGTKMM2EXT_API void                      gtk_application_set_menu_bar       (GtkMenuShell    *menu_shell);