Add line of sight tool to aid with verifying if someone can target a square for range attack or movement.

[cafelizardo]

Is your feature request related to a problem? Please describe.

Sometimes not clear if a target can be reached when planning a range attack.

Describe the new feature you'd like

Create a tool widget that will allow someone to draw a line from the center of one hex to another hex to see if a hex can be targeted. Use a rubber band effect with range popup. Possibly change color from green to red if it intersects a wall or something. That last part might be hard to add. Would be nice if you could be visible to others until removed.

Could also be used to plan movement. Drag character showing number of hexes traversed then confirm or cancel by clicking.

Another idea is to select a bomb or other area of effect which can be centered on a hex and show what other hexes would be affected.