New glow based on outlines rather than normal extension
Do a full cycle on the glow to close last mesh gap
sbox_glow_stencil > glow_stencil, push C++ side of glow
Remove non-cs version of sbox_cookieslice, never used
Some adjustments to glow, fix projection viewport being messed up, render them before translucents
https://i.imgur.com/0uvh7xX.png
Also kill old sbox_cookieslice shader source