Restmenu: replace len hardcoded content by charsmax and sizeof
Stats_logging: Replace len hardcoded contents by charsmax
Statsx: Replace len hardcoded contents by charsmax
Plmenu: replace len hardcoded content by charsmax
Stats: Replace len hardcoded contents by charsmax

Note: TOPX is over 8 char len in some languages.
Stats_logging: replace len hardcoded content by charsmax
Idlekicker: replace len hardcoded content by charsmax
Mapchooser: replace len hardcoded content by charsmax
Miscstats: replace len hardcoded content by sizeof
Restmenu: fix a typo error induced by previous commit
Statsx: Replace len hardcoded contents by sizeof
Stats: Replace len hardcoded contents by sizeof + fix typo error in previous commit
Idlekicker: replace len hardcoded content by sizeof
Nextmap: replace len hardcoded content by charsmax and sizeof
Nscommands: replace len hardcoded content by charsmax
Restmenu: more use of sizeof
Statsx: more use of sizeof
Stats: more use of sizeof
Nscommands: remove an hardcoded value
Plmenu: fix typos errors from previous commit