Changed to using a rotating log (4mb max, 1 backup kept) to
reduce HDD space used when the server runs very long.
app.log was over 100mb which prompted this change.
Tweaked the 7z settings to reduce offline archive size
by about 30% while still keeping memory use reasonable.
Becoming more relevant over time with increased weight of texts
both root and translations.
Made tools page not appear in offline.