Forbid wrong compiler generated copy constructors

This fixes cppcheck warnings (style) 'class x' does not have a copy constructor
which is recommended since the class contains a pointer to allocated memory.

src/Thesaurus.h

@@ -27,6 +27,9 @@ namespace lyx {
 
 class Thesaurus
 {
+	/// noncopyable
+	Thesaurus(Thesaurus const &);
+	void operator=(Thesaurus const &);
 public:
 	///
 	Thesaurus();

src/Undo.h

@@ -47,6 +47,9 @@ enum UndoKind {
 
 class Undo
 {
+	/// noncopyable
+	Undo(Undo const &);
+	void operator=(Undo const &);
 public:
 
 	Undo(Buffer &);

src/frontends/qt4/FileDialog.h

@@ -25,6 +25,9 @@ namespace lyx {
  */
 class FileDialog
 {
+	/// noncopyable
+	FileDialog(FileDialog const &);
+	void operator=(FileDialog const &);
 public:
 	/// label, directory path button
 	typedef std::pair<QString, QString> Button;

src/frontends/qt4/GuiView.cpp

@@ -269,8 +269,12 @@ typedef shared_ptr<Dialog> DialogPtr;
 } // namespace anon
 
 
-struct GuiView::GuiViewPrivate
+class GuiView::GuiViewPrivate
 {
+	/// noncopyable
+	GuiViewPrivate(GuiViewPrivate const &);
+	void operator=(GuiViewPrivate const &);
+public:
 	GuiViewPrivate(GuiView * gv)
 		: gv_(gv), current_work_area_(0), current_main_work_area_(0),
 		layout_(0), autosave_timeout_(5000),

src/frontends/qt4/GuiView.h

@@ -287,7 +287,7 @@ private:
 	bool goToFileRow(std::string const & argument);
 
 	///
-	struct GuiViewPrivate;
+	class GuiViewPrivate;
 	GuiViewPrivate & d;
 
 public:

src/frontends/qt4/LayoutBox.cpp

@@ -103,8 +103,12 @@ public:
 //
 /////////////////////////////////////////////////////////////////////
 
-struct LayoutBox::Private
+class LayoutBox::Private
 {
+	/// noncopyable
+	Private(Private const &);
+	void operator=(Private const &);
+public:
 	Private(LayoutBox * parent, GuiView & gv) : p(parent), owner_(gv),
 		inset_(0),
 		// set the layout model with two columns

src/frontends/qt4/LayoutBox.h

@@ -61,7 +61,7 @@ private Q_SLOTS:
 
 private:
 	friend class LayoutItemDelegate;
-	struct Private;
+	class Private;
 	Private * const d;
 };
 

src/frontends/qt4/Menus.h

@@ -58,6 +58,9 @@ private:
 
 class Menus
 {
+	/// noncopyable
+	Menus(Menus const &);
+	void operator=(Menus const &);
 public:
 	Menus();
 	~Menus();

src/frontends/qt4/TocModel.h

@@ -34,6 +34,9 @@ class TocTypeModel;
 /// There is one TocModel per list in the TocBackend.
 class TocModel
 {
+	/// noncopyable
+	TocModel(TocModel const &);
+	void operator=(TocModel const &);
 public:
 	///
 	TocModel(QObject * parent);