title: Tinymce applies heading style to whole paragraph, not only selected text
body: <p>I have just noticed an annoying behavior of TinyMCE editor. When I have written, let's say, a few paragraphs of text, and I want to select some of it and make it a heading (Heading 2 style), the whole text gets that heading style, not only the text I have selected.</p>
  
  <p>This is not happening when I want to apply bolding - in this case it works as expected; only the selected text becomes bolded.</p>
  
  <p><strong>How can I change this behavior?</strong> I know there is HTML mode where I can change the style, but I am afraid my clients are not so familiar with HTML and they'd want to use visual mode only.</p>