Implement Go To Source for trigger actions

[Shushishtok]

Adds a button that shows up below the parameters when a parameter references one of the following:

• Trigger (e.g. Enable Trigger/Disable Trigger)
• Team Type (e.g. Reinforcements)
• Waypoint (e.g. Reveal Around Waypoint)

When clicked, the button focuses on the respective parameter's value, selecting it or centering around it.