REMOVE: grid qt.pi.

I removed grid qt.pi bi because it is now a part of the main qt.pi
version.
Revert "REMOVE: grid qt.pi."

This reverts commit 3502b2730e5e3be48f5bc11b6baf49bf7ac0c1fa.
REMOVE: grid qt.pi.

It is now a part of the main qt.pi release.