add functions of loaded packages to auto-completion list (bug #56207) * file-editor-tab.cc (update_lexer_settings): add boolean argument for updating apis but no other settings, clear current apis entries before adding all current functions and keywords * file-editor-tab.h: (update_lexer_settings): add boolean argument for updating apis but no other settings and define as slot * file-editor.cc (make_file_editor_tab): connect new main window signal for updating auto completion word lists with the slot in file_editor_tab * main-window.cc (construct_octave_qt_link): connect new qt-link signal for updating auto completion word lists with the related new main window signal * main-window.h: new signal for word list update * qt-interpreter-events.cc (update_gui_lexer): new method emitting signal for updateing the auto completion word list * qt-interpreter-events.h: new method update_gui_lexer and new signal update_gui_lexer_signal * event-manager.cc (__event_manager_update_gui_lexer__): new function for requesting an update of the auto completion worf lists * event-manager.h (void update_gui_lexer): new method calling the virtual methos which is re-implemented in qt event manager * load_packages_and_dependencies.m: call __event_manager_update_gui_lexer__ after laoding a package if gui is running * unload_packages.m: call __event_manager_update_gui_lexer__ after unloading a packages if gui is running

--- a/libgui/src/qt-interpreter-events.cc	Wed Sep 23 21:23:32 2020 +0200
+++ b/libgui/src/qt-interpreter-events.cc	Thu Sep 24 20:49:43 2020 +0200
@@ -447,6 +447,11 @@
     emit unregister_doc_signal (QString::fromStdString (file));
   }
 
+  void qt_interpreter_events::update_gui_lexer (void)
+  {
+    emit update_gui_lexer_signal (true);
+  }
+
   void qt_interpreter_events::directory_changed (const std::string& dir)
   {
     emit directory_changed_signal (QString::fromStdString (dir));