Page is scrolled to top and back when user click on content in Source mode

Steps to reproduce:

• create a page with content enough to generate a scroll bar in WYSIWYG Edit mode
• Go to WYSIWYG Edit Mode and switch to Source tab
• scroll down to the middle of the document, and put the cursor somewhere in the content

You will see that the page is automatically scrolled up and then, back to the section you put your cursor. The line you've put the cursor to is t he last line visible from the text area.

Reproduces only on IE8

I have put this issue as major because it is extremely annoying for end-users.