GMToolbox - Uncrashable Prop Protection + Exploit Detector

Features:

1. EntityLimits now contain all sbox_max limits

Fixes:

1. Ent persistence warning about DarkRP entities removal even if you didn't have any previously
2. Potential fix for edge case with entities being partially removed (not sure if GMT is the cause)

Files affected:

1. lua/autorun/server/sv_gmtoolbox_autorun.lua
2. lua/gmtoolbox/modules/ownability/sv_playerdisconnect.lua
3. lua/gmtoolbox/utils/sh_misc.lua
4. lua/gmtoolbox/utils/sv_entmeta.lua