keybindings too

Author: zadjii-msft

src/cascadia/TerminalApp/AppActionHandlers.cpp

@@ -1311,6 +1311,12 @@ namespace winrt::TerminalApp::implementation
                                              const ActionEventArgs& args)
     {
         auto scratchPane{ winrt::make_self<ScratchpadContent>() };
+
+        // This is maybe a little wacky - add our key event handler to the pane
+        // we made. So that we can get actions for keys that the content didn't
+        // handle.
+        scratchPane->GetRoot().KeyDown({ this, &TerminalPage::_KeyDownHandler });
+
         auto resultPane = std::make_shared<Pane>(*scratchPane);
         _SplitPane(SplitDirection::Automatic, 0.5f, resultPane);
         args.Handled(true);