FreenetIS

refs #957: "I'm older than x years" checkbox is only shown on self-register page

refs #957: Application of increase_decrease_buttons for settings fields in users tab

refs #957: Separate settings group for members date of born

refs #957: minimal main user age validator fix (valid::numeric accepts decimal numbers)

refs #957: "I'm older than x years" checkbox is only shown when adding/editing main user

ref #957: Birthday is not required

refs #935: Set minimum limit for post_max_size and upload_max_filesize to 1M.

Merge remote-tracking branch 'GitLab/develop' into develop

refs #967: Filtering destination account

refs #864: Fixes C&P Jeff error :-) and improves label of registration form link from applicants member and hide link when self-registration is disabled.