GMToolbox - Uncrashable Prop Protection + Exploit Detector

Fixes:

1. Some map entities being set at wrong positions when restored due to parenting
2. Always prevent ghosting map entities with GMToolbox dashboard
3. Removed all remaining instances of player.GetHumans() with player.Iterator where applicable

Files affected:

1. lua\gmtoolbox\modules\misc\sv_restoremapents.lua
2. lua\gmtoolbox\modules\vgui\sv_networking.lua
3. lua\gmtoolbox\utils\sv_entmeta.lua
4. lua/autorun/server/sv_gmtoolbox_autorun.lua
5. lua/gmtoolbox/modules/net/sv_netratelimit.lua
6. lua/gmtoolbox/modules/vgui/elements/buddies_menu.lua
7. lua/gmtoolbox/utils/sv_lagdetector.lua
8. lua/gmtoolbox/utils/sv_notify.lua

Note: with some maps, removing and attempting to restore entities may sometimes not work. Unfortunately, there is no way around this without performing a map cleanup, or wil patience as entities like doors may resolve themselves.