Set specific timeline title for form creation

Summary:
The timeline for an EditEngine form says created this object. It should say created this form.

Closes T15880

Test Plan: Go to http://phorge.localhost/transactions/editengine/maniphest.task/ and create an EditEngine form, scroll down to its timeline.

Reviewers: O1 Blessed Committers, speck

Reviewed By: O1 Blessed Committers, speck

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Maniphest Tasks: T15880

Differential Revision: https://we.phorge.it/D25726