Refs #12145 create form with json form editor. Fix unicode error. Fix form file sync (even though disabled). Throw errors if json encode/decode fails. Put form backups into folder named by form id.

Master

See merge request !324

Develop

See merge request !323

F11998 custom qfq function

See merge request !321

Refs #11998 - Change funtion notation from ':' to '=>'. Make special column definition available via '{{&...:R}}''

Refs #11998 - function() is now fired even if there is no 'sql = ...'. NEW: '10.sql=' is allowed and 'shead' and 'althead' are processed even if 10.sql is an empty string.

fixed problem of empty string not displaying fabric image

See merge request !319

Refs #12015 Use advanced form editor by default

See merge request !320

Master

See merge request !318

Develop

See merge request !317

# Conflicts:
#	Documentation/Report.rst

Implements #12085 Persistent download links. 1) Doku fehlt, 2) Nur eine...

See merge request !316

Implements #12085. Add doc and custom error message. Finalize directDownload notation. Add unit test.