gui: Add indent/unindent edit menu to editor (Bug #41223) * libgui/src/m-editor/file-editor.h (file_editor::private): Add _indent_selection_action, _unindent_selection_action menus. (file_editor::request_indent_selected_text): New function. (file_editor::request_indent_selected_text): New function. (file_editor::fetab_indent_selected_text): New signal. (file_editor::fetab_indent_selected_text): New signal. * libgui/src/m-editor/file-editor.cc (file_editor::request_indent_selected_text): New function. (file_editor::request_unindent_selected_text): New function. (file_editor::contruct: Create indent menus and connect signals. (file_editor::set_shortcuts): Enable/disable indent menus and shortcuts. (file_editor::check_actions): Enable indent menus if have editor tabs. * libgui/src/m-editor/file-editor-tab.h (file-editor-tab::indent_selected_text): New function. (file-editor-tab::unindent_selected_text): New function. (file-editor-tab::do_indent_selected_text): New function. * libgui/src/m-editor/file-editor-tab.cc (file-editor-tab::indent_selected_text): New function. (file-editor-tab::unindent_selected_text): New function. (file-editor-tab::do_indent_selected_text): New function.

--- a/libgui/src/m-editor/file-editor.h	Sat Jan 18 09:25:33 2014 +0100
+++ b/libgui/src/m-editor/file-editor.h	Sat Jan 18 08:50:03 2014 -0500
@@ -91,6 +91,8 @@
   void fetab_remove_all_breakpoints (const QWidget* ID);
   void fetab_comment_selected_text (const QWidget* ID);
   void fetab_uncomment_selected_text (const QWidget* ID);
+  void fetab_indent_selected_text (const QWidget* ID);
+  void fetab_unindent_selected_text (const QWidget* ID);
   void fetab_find (const QWidget* ID);
   void fetab_goto_line (const QWidget* ID, int line = -1);
   void fetab_insert_debugger_pointer (const QWidget* ID, int line = -1);
@@ -139,6 +141,10 @@
 
   void request_comment_selected_text (void);
   void request_uncomment_selected_text (void);
+
+  void request_indent_selected_text (void);
+  void request_unindent_selected_text (void);
+
   void request_find (void);
 
   void request_goto_line (void);
@@ -201,6 +207,9 @@
   QAction *_comment_selection_action;
   QAction *_uncomment_selection_action;
 
+  QAction *_indent_selection_action;
+  QAction *_unindent_selection_action;
+
   QAction *_copy_action;
   QAction *_cut_action;
   QAction *_paste_action;