Fix 'closeWindow' ignoring confirmation (#18434)

Reroutes the `closeWindow` action to use the `CloseWindow()` method like
the window's X button does. This includes logic to display the
confirmation dialog.

Also removes `CloseRequested` as it was only used by this action
handler. We already have `CloseWindowRequested` so we're just using that
instead.

## Validation Steps Performed
✅ `closeWindow` action while multiple tabs opened brings up the
confirmation dialog

Closes #17613

(cherry picked from commit fb7b0e1)
Service-Card-Id: PVTI_lADOAF3p4s4AmhmszgWkUeM
Service-Version: 1.21

Author: carlos-zamora

src/cascadia/TerminalApp/AppActionHandlers.cpp

@@ -118,7 +118,7 @@ namespace winrt::TerminalApp::implementation
     void TerminalPage::_HandleCloseWindow(const IInspectable& /*sender*/,
                                           const ActionEventArgs& args)
     {
-        CloseRequested.raise(nullptr, nullptr);
+        CloseWindow();
         args.Handled(true);
     }
 

src/cascadia/TerminalApp/TerminalPage.h

@@ -186,7 +186,6 @@ namespace winrt::TerminalApp::implementation
         til::typed_event<IInspectable, winrt::TerminalApp::RenameWindowRequestedArgs> RenameWindowRequested;
         til::typed_event<IInspectable, IInspectable> SummonWindowRequested;
 
-        til::typed_event<IInspectable, IInspectable> CloseRequested;
         til::typed_event<IInspectable, IInspectable> OpenSystemMenu;
         til::typed_event<IInspectable, IInspectable> QuitRequested;
         til::typed_event<IInspectable, winrt::Microsoft::Terminal::Control::ShowWindowArgs> ShowWindowChanged;

src/cascadia/TerminalApp/TerminalPage.idl

@@ -97,7 +97,6 @@ namespace TerminalApp
         event Windows.Foundation.TypedEventHandler<Object, RenameWindowRequestedArgs> RenameWindowRequested;
         event Windows.Foundation.TypedEventHandler<Object, Object> SummonWindowRequested;
 
-        event Windows.Foundation.TypedEventHandler<Object, Object> CloseRequested;
         event Windows.Foundation.TypedEventHandler<Object, Object> OpenSystemMenu;
         event Windows.Foundation.TypedEventHandler<Object, Microsoft.Terminal.Control.ShowWindowArgs> ShowWindowChanged;
 

src/cascadia/TerminalApp/TerminalWindow.h

@@ -223,7 +223,6 @@ namespace winrt::TerminalApp::implementation
         FORWARDED_TYPED_EVENT(IdentifyWindowsRequested, Windows::Foundation::IInspectable, Windows::Foundation::IInspectable, _root, IdentifyWindowsRequested);
         FORWARDED_TYPED_EVENT(RenameWindowRequested, Windows::Foundation::IInspectable, winrt::TerminalApp::RenameWindowRequestedArgs, _root, RenameWindowRequested);
         FORWARDED_TYPED_EVENT(SummonWindowRequested, Windows::Foundation::IInspectable, Windows::Foundation::IInspectable, _root, SummonWindowRequested);
-        FORWARDED_TYPED_EVENT(CloseRequested, Windows::Foundation::IInspectable, Windows::Foundation::IInspectable, _root, CloseRequested);
         FORWARDED_TYPED_EVENT(OpenSystemMenu, Windows::Foundation::IInspectable, Windows::Foundation::IInspectable, _root, OpenSystemMenu);
         FORWARDED_TYPED_EVENT(QuitRequested, Windows::Foundation::IInspectable, Windows::Foundation::IInspectable, _root, QuitRequested);
         FORWARDED_TYPED_EVENT(ShowWindowChanged, Windows::Foundation::IInspectable, winrt::Microsoft::Terminal::Control::ShowWindowArgs, _root, ShowWindowChanged);

src/cascadia/TerminalApp/TerminalWindow.idl

@@ -127,7 +127,6 @@ namespace TerminalApp
         event Windows.Foundation.TypedEventHandler<Object, RenameWindowRequestedArgs> RenameWindowRequested;
         event Windows.Foundation.TypedEventHandler<Object, Object> IsQuakeWindowChanged;
         event Windows.Foundation.TypedEventHandler<Object, Object> SummonWindowRequested;
-        event Windows.Foundation.TypedEventHandler<Object, Object> CloseRequested;
         event Windows.Foundation.TypedEventHandler<Object, Object> OpenSystemMenu;
         event Windows.Foundation.TypedEventHandler<Object, Object> QuitRequested;
         event Windows.Foundation.TypedEventHandler<Object, TerminalApp.SystemMenuChangeArgs> SystemMenuChangeRequested;

src/cascadia/WindowsTerminal/AppHost.cpp

@@ -320,9 +320,6 @@ void AppHost::Initialize()
     _windowCallbacks.WindowCloseButtonClicked = _window->WindowCloseButtonClicked([this]() {
         _windowLogic.CloseWindow();
     });
-    // If the user requests a close in another way handle the same as if the 'X'
-    // was clicked.
-    _revokers.CloseRequested = _windowLogic.CloseRequested(winrt::auto_revoke, { this, &AppHost::_CloseRequested });
 
     // Add an event handler to plumb clicks in the titlebar area down to the
     // application layer.

src/cascadia/WindowsTerminal/AppHost.h

@@ -178,7 +178,6 @@ class AppHost : public std::enable_shared_from_this<AppHost>
         winrt::Microsoft::Terminal::Remoting::Peasant::AttachRequested_revoker AttachRequested;
 
         winrt::TerminalApp::TerminalWindow::Initialized_revoker Initialized;
-        winrt::TerminalApp::TerminalWindow::CloseRequested_revoker CloseRequested;
         winrt::TerminalApp::TerminalWindow::RequestedThemeChanged_revoker RequestedThemeChanged;
         winrt::TerminalApp::TerminalWindow::FullscreenChanged_revoker FullscreenChanged;
         winrt::TerminalApp::TerminalWindow::FocusModeChanged_revoker FocusModeChanged;