Currently, if you attempt to name a Trigger's Action a name that is used by another Trigger's Action, it produces a XAML error.

Unlike in other areas of Studio, when the user attempts an operation that would create a Disallowed Duplicate Name, they are presented with a Red Warning Toast notification informing them of the disallowed action.

Repro Steps:

1) Open the Stratus Project from the InternalProjects GitHub, and open Scene.xaml
2) Navigate to the Triggers Panel (Ctrl+3)
3) Select any Trigger from the list, and in its Properties Panel, select any of the added Actions, and give it a new custom name by double-clicking on it.
4) Select any other Trigger from the list, and in its Properties Panel, select any of the added Actions, and give it the exact same name as the one given in Step 3).

Observe how a XAML error is produced.

Expected Results: If Duplicate names are not permitted, the user should be prevented from inputting it, and should instead be shown a red Toast Notification informing them that the name is already in use, and cannot be entered.