Pressing outdent merges first list item with previous line if enter mode is BR

[csmaclaga]

Steps to reproduce

1. Go to:

​http://sdk.ckeditor.com/samples/enterkey.html

2. Switch enter mode to BR
3. Enter sample text:

this is the first line

• line 2
• line 3

4. Put the cursor at the beginning of line 2 and press either outdent or the backspace key

Expected result

this is the first line
line 2

• line 3

Actual result

this is the first lineline 2

• line 3

Other details (browser, OS, CKEditor version, installed plugins)

[Jakub Ś]

Problem can be reproduced at least from CKEditor 4.0 only in enter mode BR.

In other modes result is e.g.

<p>ddddd</p>
<p>dddd</p>
<ul>
	<li>ddd</li>
</ul>

so it is expected that this mode produces same result.