Merge remote branch 'kc/new/enh/bug_1962' into kcmaster

Merge remote branch 'kc/new/enh/bug_1962' into kcmaster

Conflicts:
	circ/returns.pl
	installer/data/mysql/fr-FR/1-Obligatoire/unimarc_standard_systemprefs.sql
	installer/data/mysql/it-IT/necessari/sysprefs.sql
	installer/data/mysql/pl-PL/mandatory/sysprefs.sql
	installer/data/mysql/ru-RU/mandatory/system_preferences_full_optimal_for_install_only.sql
	installer/data/mysql/uk-UA/mandatory/system_preferences_full_optimal_for_install_only.sql
	installer/data/mysql/updatedatabase.pl
	kohaversion.pl