Add getGridWindow to GridTab

Description

According to https://groups.google.com/d/msg/idempiere/jaG0Rs9wMyw/W04Anxe78AAJ
there is no actual way to set a value on a different tab on a callout, this is useful in quick entry callouts.

Found that adding GridTab.getGridWindow allows to implement this easily

Environment

None

Assignee

Carlos Ruiz

Reporter

Carlos Ruiz

Labels

None

Tested By

None

Priority

Major
Configure