try to use consitent ordering for include files in libgui sources Use alphabetical ordering for include files in libgui sources. Group in blocks in teh following order: standard header files Qt header files libgui header files liboctave header files libinterp header files Use forward declarations for Octave classes where possible. Files affected: color-picker.h, dialog.cc, dialog.h, documentation-dock-widget.h, documentation.cc, dw-main-window.cc, dw-main-window.h, external-editor-interface.cc, external-editor-interface.h, files-dock-widget.cc, files-dock-widget.h, find-files-dialog.cc, find-files-dialog.h, find-files-model.h, gui-preferences-mw.h, gui-preferences.h, history-dock-widget.cc, history-dock-widget.h, interpreter-qobject.cc, m-editor/file-editor-interface.h, m-editor/file-editor-tab.cc, m-editor/file-editor-tab.h, m-editor/file-editor.cc, m-editor/file-editor.h, m-editor/marker.h, m-editor/octave-qscintilla.cc, m-editor/octave-qscintilla.h, main-window.cc, main-window.h, octave-dock-widget.cc, octave-dock-widget.h, octave-qobject.cc, qt-application.cc, qt-interpreter-events.cc, qt-interpreter-events.h, resource-manager.cc, resource-manager.h, set-path-dialog.cc, set-path-dialog.h, set-path-model.cc, set-path-model.h, settings-dialog.cc, settings-dialog.h, shortcut-manager.cc, shortcut-manager.h, tab-bar.h, terminal-dock-widget.cc, terminal-dock-widget.h, variable-editor.cc, variable-editor.h, welcome-wizard.cc, welcome-wizard.h, workspace-model.cc, workspace-model.h, workspace-view.cc, and workspace-view.h.

--- a/libgui/src/main-window.cc	Fri Jun 07 10:14:35 2019 +0200
+++ b/libgui/src/main-window.cc	Sun Sep 15 12:28:23 2019 -0400
@@ -25,36 +25,37 @@
 #  include "config.h"
 #endif
 
-#include <QKeySequence>
+#include <utility>
+
+#include <QAction>
 #include <QApplication>
-#include <QStyleFactory>
+#include <QDateTime>
+#include <QDebug>
+#include <QDesktopServices>
+#include <QDesktopWidget>
+#include <QFileDialog>
+#include <QIcon>
 #include <QInputDialog>
+#include <QKeySequence>
 #include <QLabel>
+#include <QMenu>
 #include <QMenuBar>
-#include <QMenu>
-#include <QAction>
+#include <QMessageBox>
 #include <QSettings>
 #include <QStyle>
 #include <QStyleFactory>
-#include <QToolBar>
-#include <QDesktopServices>
-#include <QDesktopWidget>
-#include <QFileDialog>
-#include <QMessageBox>
-#include <QIcon>
+#include <QStyleFactory>
 #include <QTextBrowser>
 #include <QTextCodec>
 #include <QTextStream>
 #include <QThread>
-#include <QDateTime>
-#include <QDebug>
 #include <QTimer>
-
-#include <utility>
+#include <QToolBar>
 
 #if defined (HAVE_QSCINTILLA)
 #  include "file-editor.h"
 #endif
+#include "gui-preferences-mw.h"
 #include "interpreter-qobject.h"
 #include "main-window.h"
 #include "news-reader.h"
@@ -62,7 +63,6 @@
 #include "settings-dialog.h"
 #include "shortcut-manager.h"
 #include "welcome-wizard.h"
-#include "gui-preferences-mw.h"
 
 #include "Array.h"
 #include "cmd-edit.h"