Visual desync issue with other players falling

[rssujay]

Sometimes, when a non-device (networked) player is falling, they appear to be falling in slow-motion and teleporting back up.

1. Determined to not be an issue with network updates (yellow = expected behaviour, red = issue noticed)
   

2. explored @jushg's theory, that differences in screen sizes causes foreign player entity to collide with local entities, such as clouds, which may be in different positions under absolute (x, y) positioning.

Switching to relative positioning can mitigate the issue, unlikely to solve due to loss of accuracy during conversion, as well as current plans to only resolve via scaling width. If this is something we can live with, that's okay.

Considered other possibilities:

• Should player entities from other devices be affected by local device non-player entities?
• Should player entities from other devices be affected by local device gravity?

An approach that looks like this also appears to fix the issue:

[jushg]

If the speculation above is correct, then an issue with visual desync when a player respawn in #96 will also be fixed

[jushg]

As for other possibilities you mentioned, I believe that we should maintain the gravity (to make the UI smoother in case any one player is lagging). However, the player affect by other player should be changed, as it currently leads to a funny situation when a player standing on top of another player on a cloud is valid.