Bug 23459 add preference option to turn off variable guessing on method completion
request from Adam
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, ContentAssistPreference.AUTOACTIVATION_TRIGGERS_JAVA),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.STRING, ContentAssistPreference.AUTOACTIVATION_TRIGGERS_JAVADOC),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, ContentAssistPreference.SHOW_VISIBLE_PROPOSALS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, ContentAssistPreference.ORDER_PROPOSALS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, ContentAssistPreference.CASE_SENSITIVITY),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, ContentAssistPreference.ADD_IMPORT),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, ContentAssistPreference.FILL_METHOD_ARGUMENTS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.CLOSE_STRINGS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.CLOSE_BRACKETS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.CLOSE_JAVADOCS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.SKIP_CLOSING_QUOTES),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.SKIP_CLOSING_BRACKETS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.WRAP_STRINGS),
		new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, CompilationUnitEditor.ADD_JAVADOC_TAGS)
	};
	
	private final String[][] fSyntaxColorListModel= new String[][] {
		{ JavaUIMessages.getString("JavaEditorPreferencePage.multiLineComment"), IJavaColorConstants.JAVA_MULTI_LINE_COMMENT }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.singleLineComment"), IJavaColorConstants.JAVA_SINGLE_LINE_COMMENT }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.keywords"), IJavaColorConstants.JAVA_KEYWORD }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.strings"), IJavaColorConstants.JAVA_STRING }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.others"), IJavaColorConstants.JAVA_DEFAULT }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.javaDocKeywords"), IJavaColorConstants.JAVADOC_KEYWORD }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.javaDocHtmlTags"), IJavaColorConstants.JAVADOC_TAG }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.javaDocLinks"), IJavaColorConstants.JAVADOC_LINK }, 
		{ JavaUIMessages.getString("JavaEditorPreferencePage.javaDocOthers"), IJavaColorConstants.JAVADOC_DEFAULT } 
	};
	
	private final String[][] fAppearanceColorListModel= new String[][] {
		{JavaUIMessages.getString("JavaEditorPreferencePage.lineNumberForegroundColor"), JavaEditor.LINE_NUMBER_COLOR},