Firefox, Webkit and Opera - Can't exit link at the end of document in bbcode

[Jakub Ś]

To reproduce:

1. Open bbcode sample and clear all contents
2. Insert link http://google.com?test=1&abc=txt using link dialog
3. Put the cursor at the end of link and try to exit it using Arrows, End, Space or Enter key.

Result: You can't exit link when it is the last element in the document.

Issue reproducible in Webkit and Opera from CKEditor 3.6 rev [6904]

Note: In Firefox you can exit link only if you press End key. Perhaps it has something to do with leaving element boundaries - #8195