added Syntagma::highest_forefather point
SourceEditor::mouseMoveEvent() now manages to display some text selections in various colors
improved the a-mode : basic functionalities are ok
Merge branch 'feature99' into dev
Improved a-mode : basic functionalities are ok.
modified MainWindow::MainWindow() in order to allow keyboard shortcuts to access the main menu
Merge branch 'feature100' into dev
Modified MainWindow::MainWindow() : keyboard shortcuts can now be used just after the splash screen to access the main menu.