Icons for toolbar base commands
A menu either has a label or an icon, not both (not supported by Eclipse)
fix
Moved 'observer', 'provider' and 'on-save' from YourLang-Builders.esv to YourLang.main.esv
Generation of YourLang-Menus.esv
collectTerms now does a collect-om rather than a collect-all
MenuFactory: support for submenus
DynamicContributionItem: support for submenus
Deprecated builder rules
fix
Keep generated yourlang-Builders.generated.esv in case yourlang-Builders.esv is imported from yourlang.main.esv. This to prevent legacy project from breaking.