outdent RLT list item with subsequent LTR item

[Garry Yao]

1. Load the following editor content:

   <ol>
   	<li>
   		foo
   		<ol>
   			<li dir="rtl">
   				^bar</li>
   			<li>
   				baz</li>
   		</ol>
   	</li>
   </ol>
   

2. Press the Outdent button

• Actual:

  <ol>
  	<li>
  		foo</li>
  	<li dir="rtl">
  		bar
  		<ol>
  			<li>
  				baz</li>
  		</ol>
  	</li>
  </ol>
  

• Expected:

  <ol>
  	<li>
  		foo</li>
  	<li dir="rtl">
  		bar
  		<ol>
  			<li dir="ltr">
  				baz</li>
  		</ol>
  	</li>
  </ol>
  

[Garry Yao]

Not a recent regression.

[Jakub Ś]

Reproducible in all browsers from CKEditor 3.3.

Additinally IE and FF wrap "bar" in P or DIV (even in BR mode!) - #9151