Bug 56543 [preferences] Switching to Java Editor preference page shows error for a short time
3.0 M8 Switching to Text Editor preference page shows error for a short time
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
GridLayout layout= new GridLayout(); 
		layout.numColumns= 2;
		contentAssistComposite.setLayout(layout);
		addCompletionRadioButtons(contentAssistComposite);
		String label;		
		label= PreferencesMessages.getString("JavaEditorPreferencePage.insertSingleProposalsAutomatically"); 
		addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_AUTOINSERT, 0);		
		label= PreferencesMessages.getString("JavaEditorPreferencePage.showOnlyProposalsVisibleInTheInvocationContext"); 
		addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_SHOW_VISIBLE_PROPOSALS, 0);
		
		label= PreferencesMessages.getString("JavaEditorPreferencePage.presentProposalsInAlphabeticalOrder"); 
		addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_ORDER_PROPOSALS, 0);
		
		label= PreferencesMessages.getString("JavaEditorPreferencePage.automaticallyAddImportInsteadOfQualifiedName"); 
		addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_ADDIMPORT, 0);
		label= PreferencesMessages.getString("JavaEditorPreferencePage.fillArgumentNamesOnMethodCompletion"); 
		Button button= addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_FILL_ARGUMENT_NAMES, 0);
		label= PreferencesMessages.getString("JavaEditorPreferencePage.guessArgumentNamesOnMethodCompletion"); 
		fGuessMethodArgumentsButton= addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_GUESS_METHOD_ARGUMENTS, 0);
		createDependency(button, fGuessMethodArgumentsButton);
		label= PreferencesMessages.getString("JavaEditorPreferencePage.enableAutoActivation"); 
		final Button autoactivation= addCheckBox(contentAssistComposite, label, PreferenceConstants.CODEASSIST_AUTOACTIVATION, 0);
		autoactivation.addSelectionListener(new SelectionAdapter(){
            public void widgetSelected(SelectionEvent e) {
            	updateAutoactivationControls();
            }
		});		
		
		Control[] labelledTextField;
		label= PreferencesMessages.getString("JavaEditorPreferencePage.autoActivationDelay");