Selecting trains requires you to click on top of the track it is on, not the train itself

[mpomery]

In this image clicking on the purple train where the pointer currently is does not select the train.
Same with clicking on the front of the red and rightmost blue trains.

Clicking where the pointer is now selects the rightmost blue train even though the pointer is not above the train

Hitbox shown:

[mpomery]

From Discord:

MitchPommers: Thinking about improving train clickability. Options:

• Update GameBoard.GetMovableAt to find the train in it's current+it's next cell
• Send PointerTool the x+y coords of the pointer then find trains where the pointer falls within the radius
• Make PointerTool use draggable instead (feels hacky)
• Stop trains being directly clickable and instead create a list of trains you can select from

davidwengier: I think this (Stop trains being directly clickable and instead create a list of trains you can select from), or possibly just removing clicking altogether
davidwengier: but as a "game", clicking on a specific train seems unnecessary