Add files is disabled in project's context menu

If "Add New.." from project context menu was opened by button "Enter" - "Add new.." disabled on next open project context menu, but if open by mouse click - it works correct.

I can reproduce this issue in any prior release.

Steps to reproduce:
1) Open project context menu.
2) Choose "Add new" by button down.
3) Push to "Enter"
4) Click to cancel in shown window, or push "Esc"
5) Open project context menu again.

Actual:

Expected: