The page is scrolled to the top when creating a new empty line or inserting a horizontal ruler on Chrome

Steps to reproduce:

• Navigate to a document with a lot of content that has a scrollbar when you are in edit mode (for example Sandbox.WebHome)
• Hover over "Edit" and click on "WYSIWYG"
• Scroll to the bottom of the document
• Place the cursor at the end of the document
• Press on "Enter"

The page scrolls to the top. Also when you click on "Insert Horizontal Ruler" you get the same unwanted behaviour. I couldn't reproduce this bug on IE8/9 and Firefox.