Added blur recomputation to Derma_DrawBackgroundBlur
Fix GM:GetVehicles()

vehicles library is gone, so we gotta use new method. But why do we even need this function and why it's clientside only?
Fix texture for TextBox_Disabled.

The Y position of the texture for TextBox_Disabled is 1 pixel off causing disabled textboxes to display incorrectly.
TTT: fix thrown knife sometimes dealing double damage

A knife thrown from short range should not kill unless the target is
<50hp. Bug was causing the knife to hit the target twice, killing them
and still dropping the knife for reuse.

Seems likely that this was introduced due to some sort of physics
fix/change elsewhere, because I'm pretty sure this didn't happen way
back when I implemented the knife.
Fixes for slider tool

* Fixed double left click on world which prevented future tool use
unless rightclicked
* Fixed console error spam about gmod_anchor not being AddCSLuaFile'd
Even more fixes for tools

* Fixed Delay not updating on Dynamite tool
* Fixed Keys not updating on Dynamite, Emitter, Hoverball, Lamp, Light
and Thruster tools