Option to Keep Task Dates When Copying to New Project

[#1]

When copying one or more tasks from one project to another, there should be an option to keep all the original dates.

Use case: 10 tasks exist on project A with all their dates set correctly. We need the same 10 tasks to exist on project B (that has already been created). We want to be able to copy the 10 tasks from project A to project B and keep all the original dates. Right now, the dates on the tasks once copied to project B all reset based on project B's planned start date.