Phriction: define an object creation title

Test Plan:

• Create a new phriction document, observe the history
• Apply this patch
• Observe the history again, noting that the word "document" now replaces "object"

Reviewers: O1 Blessed Committers, avivey

Reviewed By: O1 Blessed Committers, avivey

Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Differential Revision: https://we.phorge.it/D25858