Bug 15604 Promote Fill arguments on method completion to a real preference
It is still in work in progress but it has become an established feature by now. Promote the preference to the code assist preference page.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/ContentAssistPreference.java
assistant.setContextInformationPopupBackground(c);
		assistant.setContextSelectorBackground(c);
		
		enabled= store.getBoolean(AUTOINSERT);
		assistant.enableAutoInsert(enabled);
		configureJavaProcessor(assistant, store);
		configureJavaDocProcessor(assistant, store);
	}
	
	
	private static void changeJavaProcessor(ContentAssistant assistant, IPreferenceStore store, String key) {
		JavaCompletionProcessor jcp= getJavaProcessor(assistant);
		if (jcp == null)
			return;
			
		if (AUTOACTIVATION_TRIGGERS_JAVA.equals(key)) {
			String triggers= store.getString(AUTOACTIVATION_TRIGGERS_JAVA);
			if (triggers != null)
				jcp.setCompletionProposalAutoActivationCharacters(triggers.toCharArray());
		} else if (SHOW_VISIBLE_PROPOSALS.equals(key)) {
			boolean enabled= store.getBoolean(SHOW_VISIBLE_PROPOSALS);
			jcp.restrictProposalsToVisibility(enabled);
		} else if (CASE_SENSITIVITY.equals(key)) {
			boolean enabled= store.getBoolean(CASE_SENSITIVITY);
			jcp.restrictProposalsToMatchingCases(enabled);
		} else if (ORDER_PROPOSALS.equals(key)) {
			boolean enable= store.getBoolean(ORDER_PROPOSALS);
			jcp.orderProposalsAlphabetically(enable);
		} else if (ADD_IMPORT.equals(key)) {
			boolean enabled= store.getBoolean(ADD_IMPORT);