Fixes #14292. Upload: mode=required broken for advanced upload (non primary column) after first save

QFQ encrypt/decrypt WIP: Feature implementation for Forms and Report finished. QFQ Variables are in progress

#F13330 - Refactor of save(): one function processSingle() which handle a complete simple form or one row of a multi form. Small order change of FillStoreForm() and action before*().

Refs #12615. Implements silent HEIC/HEIF conversion to png. Write a note in realease notes, to install 'libheif-examples'.

Fixes #11509. Implement a) detection of broken 'split PDF to JPEG', b) fire 'pdf repair'. Also implement configuration von 'convert' and 'pdf2svg'

Refs #11035 use Path:: for paths that are defined in config. Except for Log & absolute paths... they need more work.

Fixes #10705. New function 'HelperFile::joinPathFilename($pre, $post)'. Joins only if $post is without leading slash.

Fixes #10177: Fill STORE_RECORD directly after form INSERT/UPDATE - '{{id:R}}' is now usable in processing Glue inserts.

Implements #9679: formModeGlobal is now also used via STORE_USER - set formModeGlobal systemwide for a specific user (session).

Implements #9617. a) formModeGlobal=requiredShowOnly set's the form attribute. The new STORE_VAR 'allRequiredGiven' is set