Basic console filtering
Highlight matches
https://files.facepunch.com/alexguthrie/1b0911b1/sbox-dev_RpdUULtu5w.mp4
Also apply filter to logger name
Switch to using filter terms (list of keywords separated by spaces)
Use stringbuilder instead of regex for highlighting
Use .Any instead of .All when checking filter terms
Do filter highlighting in 2 steps to prevent HTML tag contamination
Cleanup
Move filter inline