public void addSystemActions(IMenuManager menuManager) {
appendToGroupIfPossible(menuManager,
"misc", new UpdatingActionContributionItem(fastViewAction)); //$NON-NLS-1$
appendToGroupIfPossible(menuManager,
"misc", new UpdatingActionContributionItem(detachViewAction)); //$NON-NLS-1$
sizeItem = new SystemMenuSize(getSelection());
appendToGroupIfPossible(menuManager, "size", sizeItem); //$NON-NLS-1$
}