IE7-8 cut command doesn't work as expected in v4

[Jakub Ś]

To reproduce in IE7 or IE8:

1. Use TC described in #9501 or

1. Open replacebycode sample and clear editor contents
2. Type foo bar
3. Select bar from left to right
4. Click cut icon
5. Allow clipboard access if browser asks you
6. bar gets cut but notice that cut icon is still enabled (unlike in v3)
7. Press cut again
8. Editor displays message that browser doesn't have permissions to cut and CRTL+X should be used (which is not true).
   

Of course if you select some text and press cut icon it will work as expected.