Feature: #61577 - Backend markup for checkboxes with labels

See forge#61577


A typical checkbox with label form element should now be rendered as:

<div class="checkbox">
        <label for="someId">
                <input type="checkbox" id="someId" />
                Label text


If this HTML markup is applied, CSS styles by the TYPO3 core will take care of optimized view and custom CSS has become obsolete.