2.1.22

- Fix language string missing
- #731
Clean up file
Export to PDF - fix for non utf8 strings
Fix for #653 (Passwords preprended during upgrade)
Merge remote-tracking branch 'origin/Release_2.1.22' into 2.1.23

Conflicts resolved:
	changelog.md
	home.load.php
	includes/language/english.php
	sources/export.queries.php