Set color of parent project for jx-tokenizer-token milestone tag
Summary:
Make the background color of milestones project tags use the parent project's background color instead of default blue.
See similar rPaed58a3444ba.
Closes T16286
Test Plan: Set up a project tag with non-default (non-blue) color, create a milestone for that project tag, edit a task and add that milestone to the "Tags" field, look at its color
Reviewers: O1 Blessed Committers, valerio.bozzolan
Reviewed By: O1 Blessed Committers, valerio.bozzolan
Subscribers: tobiaswiese, valerio.bozzolan, Matthew, Cigaryno
Maniphest Tasks: T16286
Differential Revision: https://we.phorge.it/D26695