FreenetIS

Refs #1053: Default sort in emails set to ID which is indexed (previously by access_time), some small improvements in related queries but filters are still very slow.

Conflicts:
application/models/email_queue.php

Refs #1056: GPS in address point table is filled with NULL value instead of empty string value in order to be compactible with MySQL 5.7 and higher that do not support empty string in geometry field values

Conflicts:
application/controllers/members.php
application/controllers/registration.php

Resolves #1060: implement filter for message type in Web interface unallowed_ip_addresses

refs #1047: Fix access rule for showing account of member from member table

refs #1043: Export error display

refs #1044: Fix single member notification form when some notification type is disabled

refs #1039: Work report gradual approval fix

Conflicts:
application/controllers/work_reports.php

Never change work vote when already paied.

Conflicts:
application/controllers/works.php

refs #1034: Work report cannot be revoted after it is paied off

closes #959: Improves column label and adds a help hint