Remove spurious debug log statement.
Restore the responseType feature for GM_xhr

Broken by 59f07764b8c975cc3cef451743e3f2754fc95f45 .

Fixes #2032
Define a lower wal_autocheckpoint for script value DBs.

Per comment by @VisualKei on #1879.

Fixes #2036
Update translations from babelzilla.org.
Version bump: 2.3beta1