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/ui/PreferencesConstants.java
* Enable / Disable the usage of bold style for java default text.
	 */
	public final static String EDITOR_JAVA_DEFAULT_BOLD= IJavaColorConstants.JAVA_DEFAULT + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for javadoc keywords. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_JAVADOC_KEYWORD_COLOR= IJavaColorConstants.JAVADOC_KEYWORD;
	/**
	 * Enable / Disable the usage of bold style for javadoc keywords.
	 */
	public final static String EDITOR_JAVADOC_KEYWORD_BOLD= IJavaColorConstants.JAVADOC_KEYWORD + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for javadoc tags. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_JAVADOC_TAG_COLOR= IJavaColorConstants.JAVADOC_TAG;
	/**
	 * Enable / Disable the usage of bold style for javadoc tags.
	 */
	public final static String EDITOR_JAVADOC_TAG_BOLD= IJavaColorConstants.JAVADOC_TAG + JavaEditorPreferencePage.BOLD;
	/**
	 * Color used for javadoc links. RGB color encoded using PreferenceConverter.
	 * @see org.eclipse.jface.resource.StringConverter
	 * @see org.eclipse.jface.preference.PreferenceConverter
	 */
	public final static String EDITOR_JAVADOC_LINKS_COLOR= IJavaColorConstants.JAVADOC_LINK;
	/**