I still want copy&paste tool

Hydras can reuse a little compactified polar bear.
It's a somewhat tedious to replicate polar bear again...
Idea: numbers 2 and 3 are unused now.
Make 2 - enable/disable selection mode and 3 copy/paste.
When you press 2 you can select, move around and copy rectangular area.
When you press 2 again - you exit selection mode.
When you press 3, if selection mode is enabled and there is selection - it is copied
into internal clipboard. If there is no selection and there is something in
internal clipboard - whole thing should be displayed instead of
mouse cursor, and placed into grid on click. Pressing 3 again
while it isn't placed into grid should cancel it.