Type Ahead - Add Multiple Users

[#1]

Expand the Type Ahead Custom Field to allow multiple users. Will allow to list multiple users using the type ahead feature.

[#2]

This would be a great addition. We have a use case where we want to use typeahead fields on tasks to keep a users timesheet clean and standardize our time reporting but also have the customizability of being able to add any task needed to track a project and assign users to those tasks to work on them. The user typeahead is a perfect solution but it only allows for one user per task which is not always reality.

[#3]

With the new typeahead options, we want to extend this to be able to add multiple projects, tasks, etc.