Allow template hiding unless within token shape

[caewok]

Need to modify the hitArea. Something like:

t = canvas.templates.placeables[0]
t.off("pointerenter").on("pointerenter", event => console.log("Entered!"))
t.eventMode = "static"
t.hitArea = t.shape; // Need to make sure this is a valid shape at the actual template location.

Note: Hit area is relative to the anchor. See https://pixijs.com/examples/events/custom-hitarea

[caewok]

Added in v0.7.3.