Spectate mode is a mess

[lvictorino]

When you watch other players in a game a lot of things are not displayed to you, especially effects of bonuses.
It leads to a possible incoherent playground where lines cross other lines without any problem, or players crossing playground borders even if they are displayed as plain walls.

[Tom32i]

I definitely need to fix the spectator mod.

[Tom32i]

Some improvements have been made, we're getting there.
There's still problems when you switch tabs though.

See: #97