Refactor rename support

[micaelgallego]

When I use Ctrl+R it appears a dialog error with message "Operation unavailable in the current selection"

[micaelgallego]

With the new editor nothing happens when I type Alt+Shift+R. I wish that a rename dialog appear.

[angelozerr]

Yes I must implement it by using tsserevr rename command. Never implemented refactoring, so I don't know if it's easy.