Move player to the tower before bringing up the interation UI

[mayant15]

Left-clicking a tower brings up its interaction UI, but this should only happen once the player is near that tower.
Two approaches to do this:

1. Just detect if the player is near. Refuse to open the menu if not
2. Actually move the player to the tower and then open up the UI

Might be better to work on this after we're done with the event system