Fixed most light gray on white text issues

Also added a background for model selection in contextmenu.
Update garrysmod/lua/includes/extensions/util.lua

Fixed description on a function.
Fixed entity and weapon search

The weapons were not added to the search lists at all, the entities,
more specificly SENTS, were added twice.

The entity thing is caused by the fact, that list.Get(
"SpawnableEntities" ) already contains everything from
scripted_ents.GetSpawnable().
Fixed Portal and EP1 sounds and sound scapes.

These were fixed in beta, but for some reason were removed, so there's
the fix again. Please, test this.
TTT: Disable act command
Added Material field for custom NPCs

Also added EP2 Antlion Guardian (the yellow one) as an example.
Fixed SLAM killicon
Refixed EP1 sounds

All tested and working.
Fixed noclip gesture reset bug
Fixed duplicator.GenericDuplicatorFunction not merging tables
Added itemtest to proper category
Added Gravity Gun killicon

Yes, that thing can kill
Changed NPC headshot damage scale to 2

Because 10 is way too much
Changed height of PropSelect on most tools to 4

Because height of 6 for 2 models is kinda weird. Thrusters had height of
2, which is too small for that much models.
Added model selection for Lamp tool

It was in todos of the tool, also there is one unused model of
projector.
Improved faceposer

Added reset button and added select yourself on reload. Not sure about
last one though.
Fixed a comment typo

Geez Garry, what are we going to do with you
Revert "Improved faceposer"

This reverts commit 58ad5482665c86736142819f664995b35b501715.
Fixed HUD missing when resume game
Fixed not being able to paint on the world