Steps to reproduce:

1. Open http://www.mediawiki.org/wiki/VisualEditor:Test
2. Press "Edit"
3. Click at the end of an item in the big list at the bottom of the page.
4. Press SHIFT and LEFT, maintaining them pressed for a while

Expected behavior: Text is selected as long as SHIFT-LEFT is pressed
Actual behavior: Text is selected until deeper-level bullet is reached. When it is reached, the previous selection is unselected, and a new selection starts.

Version: unspecified
Severity: normal