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 adding JavaDoc stubs to types and methods. Boolean value.
	 */
	public static final String CODEGEN__JAVADOC_STUBS= CodeGenerationPreferencePage.PREF_JAVADOC_STUBS;
	/**
	 * Enable / Disable adding a non-javadoc comment to methods that override.
	 */
	public static final String CODEGEN__NON_JAVADOC_COMMENTS= CodeGenerationPreferencePage.PREF_NON_JAVADOC_COMMENTS;
	/**
	 * Enable / Disable adding a file comment to new created files. Boolean value.
	 */
	public static final String CODEGEN__FILE_COMMENTS= CodeGenerationPreferencePage.PREF_FILE_COMMENTS;
	
	/**
	 * Specifies the import order. Strung value, semicolon separated.
	 */
	public static final String ORGIMPORTS_IMPORTORDER= ImportOrganizePreferencePage.PREF_IMPORTORDER;
	
	/**
	 * Specifies the number of imports added before using an start-import declaration. Int value.
	 */
	public static final String ORGIMPORTS_ONDEMANDTHRESHOLD= ImportOrganizePreferencePage.PREF_ONDEMANDTHRESHOLD;
	/**
	 * Specifies to never import types that start with a lower case character. Boolean value.
	 */
	public static final String ORGIMPORTS_IGNORELOWERCASE= ImportOrganizePreferencePage.PREF_IGNORELOWERCASE;
	/**
	 * Enable / Disable showing cu children in the packages view. Boolean value.
	 */
	public static final String SHOW_CU_CHILDREN=JavaBasePreferencePage.SHOW_CU_CHILDREN;
	/**