Change plan start and end bounds

[parkerabercrombie]

Checked for duplicates

Yes - I've already checked

Alternatives considered

Yes - and alternatives don't suffice

Related problems

No response

Describe the feature request

I want to be able to change the plan start and end a plan after the plan has been created. This use case has come up for extending a plan, but I can imagine cases where you might want to change the plan start as well.

[ewferg]

I second this! It should be fairly straightforward for a user to edit plan bounds. Extending does seem like the easiest use case though. If you want to make a smaller plan, what do you do with activities outside the plan bounds?