[ClientRpc] codegen supports reserved keyword names w/ @ prefix - fixes Facepunch/sbox-issues#2227 Collect & replicate usings for codegen so we can keep stuff like initializer syntax simple whilst making it work as you would expect with namespaces - fixes Facepunch/sbox-issues#2018 Remove ErrorList singleton - not needed and some shit code was stomping it and making nothing work Add all local addons to the error list combobox (move those with errors to the top), makes it easier to filter for just the addon you give a shit about - resolves Facepunch/sbox-issues#2188 Only show errors from active addons, update combo / list on localaddons.changed - resolves Facepunch/sbox-issues#2146 Codegen add distinct namespaces only, stop some warnings