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.

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.

WIP: Implements #12085 Persistent download links. 1) Doku fehlt, 2) Nur eine SQL in der Config ist vermutlich viel zu wenig (es fehlt ein Konzept), 3) AS _link Class sollte diese Modus auch unterstuetzen, 4) symlink dl.php muss aktuell noch manuell angelegt werden.

Fixes #5444. Typeahead FE value is now prefetched after save.

See merge request !315

Implements #12022 New Escape class HtmlSpecialChar 'h'

See merge request !314

Fixes #5444. Typeahead FE value is now prefetched after save.

See merge request !313

B12015 add formEditor as a system QFQ report and enforce formEditor existence

See merge request !312

Refs #12016 : run Typo3 autoloader before password hashing if API request

See merge request !311

Refs #11926 : remove form_phpunit before running new unit tests

See merge request !310

S11953 ueberall absolute anstatt relative pfade & fix phpunit

See merge request !309