room list: replace magic table column indexes with enum. makes future changes to the room list format way easier.

marked a couple of functions as inline resolved all warnings/hints/notes added -Ooregvar optimisation (stores frequently used variables in registers, saving ~30k code size)

make search filter field have a useable size on low frontend resolution

change every return value into a more pascal-ish form, using the name of the fucntion (helps the parser and macpas compaitilibity)

make column sorting three-state: asc -> dsc -> off/default (= by room state)

sort by room state by default