improve handling of interrupts, copy and paste shortcuts * QTerminal.h (QTerminal::report_status_message): New signal. (QTerminal::QTerminal): Set shortcuts for copy and paste actions. Add copy and paste actions to QTerminal widget. Connect settings_changed, report_status_message, copyClipboard_signal, and pasteClipboard_signal. * QWinTerminalImpl.cpp (QWinTerminalImpl::copyClipboard): If selection is set, copy it and report status message. Otherwise, interrupt. * TerminalView.cpp (TerminalView::copyClipboard): Likewise. * main-window.cc (main_menu::construct_file_menu): Don't set shortcut for open action. (main_window::construct_edit_menu): Delete unimplemented cut, select all, and delete actions. Connect copy and paste actions to signals. (main_window::copyClipboard_signal, main_window::pasteClipboard_signal): New signals. (main_window::copyClipboard, main_window::pasteClipboard): New slots. (main_window::_cut_action): Delete member variable. * octave-qt-link.cc (octave_qt_link::do_pre_input_event): Disable input processing by the windows console. (octave_qt_link::do_post_input_event): Enable input processing by the windows console. * terminal-dock-widget.h, terminal-dock-widget.cc: Delete notice_settings, copyClipboard, and pasteClipboard signals, slots, and connections. (terminal_dock_widget::terminal_dock_widget): Don't connect visibilityChanged signal.

--- a/libgui/src/main-window.h
+++ b/libgui/src/main-window.h
@@ -86,6 +86,9 @@
   void update_breakpoint_marker_signal (bool insert, const QString& file,
                                         int line);
 
+  void copyClipboard_signal (void);
+  void pasteClipboard_signal (void);
+
 public slots:
   void report_status_message (const QString& statusMessage);
   void handle_save_workspace_request (void);
@@ -138,6 +141,9 @@
   void write_settings (void);
   void connect_visibility_changed (void);
 
+  void copyClipboard (void);
+  void pasteClipboard (void);
+
   void connect_uiwidget_links ();
 
   void handle_create_dialog (const QString& message, const QString& title,
@@ -256,7 +262,6 @@
   QAction *_new_script_action;
   QAction *_open_action;
 
-  QAction *_cut_action;
   QAction *_copy_action;
   QAction *_paste_action;
   QAction *_undo_action;