Pasting into editor while dialog is opening

[Tomasz Jakut]

Steps to reproduce

1. Copy some link.
2. Open ​http://sdk.ckeditor.com/samples/classic.html
3. Click inside the editor.
4. Press Ctrl + L.
5. Immediately after the previous step, press and hold Ctrl + V for a while

Expected result

Link is pasted several times into the focused field of newly opened dialog

Actual result

Link is pasted several times inside the editor. It's even possible to type into the editor while dialog is open.

Note also that this scenario is possible only when the dialog is opened for the first time. On the subsequent dialog openings the link is pasted once/twice into the editor before the focus is moved into the appropriate field inside the dialog.