Minor issues collection

[x] Entities of the beacon beam nodes only have one side of the textures drawn. (e.g. dropped item and fancy_vend vendor display) - Fixed by https://github.com/OgelGames/beacon/commit/4d1dfa63a125c4d111eb104c117d7db273984fba
[x] Occasionally the cleanup LBM incorrectly removes beam nodes. (reported to have happened on pandorabox.io server, but never occurred in testing) - Fixed by https://github.com/OgelGames/beacon/commit/4b17e5a03ae04425143b5c838cbdb72e5e622958
[x] Beacon can't be activated in space/vacuum. (caused by vacuum:vacuum node having a glasslike drawtype) - Fixed in https://github.com/OgelGames/beacon/commit/85d1a50a8bf50de971ddc4260a79c2d7e73351da
[x] Beacon effect update can be effected by lag causing effects to be incorrectly removed. (most likely due to the node timers not going as fast as global step) - Should be fixed by https://github.com/OgelGames/beacon/commit/1fb054ee7f2b6d8766430899540ad3ecc61a65d8

OgelGames / beacon