onMouseOver event

[Jmr3366]

Identify the Bug or Feature request

#720 - onMouseOver event request

Description of the Change

When the pointer moves over a token on the token layer, any library token with a macro named onMouseOver will execute.

Possible Drawbacks

For any pre-existing library tokens with a macro named onMouseOver, this could cause unintended macro execution and/or unexpected results.

Documentation Notes

Any time the mouse cursor moves over a token, the onMouseOver macro will execute if found on a library token.

Release Notes

Examples:

Create a macro on an existing or new library token, named onMouseOver.
Within this macro place:
[h: broadcast(macro.args,"self")]

When you move the mouse cursor over a token this will be output to chat
tokenid,token pixel X,token pixel Y,shift key state,control key state
When you move the mouse cursor OFF a token this will output to chat
tokenid,exit

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This change is 

[thelsing]

The comments for #4318 apply here to.