Bug 45638 [preferences] overwrite mode setting
Needs to be moved to Java>Editor>Typing.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavaEditorPreferencePage.java
SelectionListener backgroundSelectionListener= new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {				
				boolean custom= fBackgroundCustomRadioButton.getSelection();
				fBackgroundColorButton.setEnabled(custom);
				fOverlayStore.setValue(PreferenceConstants.EDITOR_BACKGROUND_DEFAULT_COLOR, !custom);
			}
			public void widgetDefaultSelected(SelectionEvent e) {}
		};
		fBackgroundDefaultRadioButton= new Button(backgroundComposite, SWT.RADIO | SWT.LEFT);
		fBackgroundDefaultRadioButton.setText(PreferencesMessages.getString("JavaEditorPreferencePage.systemDefault")); 
		fBackgroundDefaultRadioButton.addSelectionListener(backgroundSelectionListener);
		fBackgroundCustomRadioButton= new Button(backgroundComposite, SWT.RADIO | SWT.LEFT);
		fBackgroundCustomRadioButton.setText(PreferencesMessages.getString("JavaEditorPreferencePage.custom")); 
		fBackgroundCustomRadioButton.addSelectionListener(backgroundSelectionListener);
		fBackgroundColorEditor= new ColorEditor(backgroundComposite);
		fBackgroundColorButton= fBackgroundColorEditor.getButton();
		Label label= new Label(colorComposite, SWT.LEFT);
		label.setText(PreferencesMessages.getString("JavaEditorPreferencePage.foreground")); 
		label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		Composite editorComposite= new Composite(colorComposite, SWT.NONE);
		GridLayout layout= new GridLayout();
		layout.numColumns= 2;
		layout.marginHeight= 0;
		layout.marginWidth= 0;
		editorComposite.setLayout(layout);
		GridData gd= new GridData(GridData.FILL_BOTH);
		editorComposite.setLayoutData(gd);		
		fSyntaxColorList= new List(editorComposite, SWT.SINGLE | SWT.V_SCROLL | SWT.BORDER);
		gd= new GridData(GridData.FILL_BOTH);