Moved most of the annotator related menu items to the new annotator
toolbar. Each tab now has its own copy of SemGenSettings. All requests
for current settings reference that copy.
Next step is to move the remaining annotator menu items to the toolbar
and create a global settings dialog for setting the application
defaults. The button text needs to be replaced with appropriate icons
and the toolbar visually aligned with the rest of the application.
Moved the help functions to new class HelpMenu in the new menu package.