'Get the rendered preview of the contents of the Discussions new post editor
Waits for content to appear, as the preview is triggered on debounced/delayed onchange'

def get_new_post_preview_value(self, selector='.wmd-preview    >    *'):

    self.wait_for_element_visibility(selector, 'WMD    preview    pane    has    contents', timeout=10)
    return self.q(css='.wmd-preview').html[0]
