[fixed] pickup crash

[Gingerbeard5773]

Status

• READY

Description

• Fixes a client side crash that can occur when players use the pickup-menu.
  It likely also fixes potential "random" crashes that some people have, but I can't confirm this.

• Fixes an issue where players could throw blobs that weren't attached to their player.

Cause of the crash:
Line 13 StandardPickup.as

CBlob@[] blobs;
this.set("pickup blobs", blobs);
CBlob@[] closestblobs;
this.set("closest blobs", closestblobs);

This PR also changes how pickup deals with platforms.
Players cannot pickup through platforms that are facing against them, but can pickup through platforms if they are facing with them. (this addition to this PR means that #1864 and #1342 can be closed)

resolves #1864, resolves #1342, resolves #2087