B7634. Fixes #7634. Session Timeout zu kurz. The bug was probably not a bug, but a too short timeout together with an misleading exception (logout and in - but reload the page also leads to valid page). The fix is 'take the system default (php.ini) and set that one'.

Rewrote some doc. Extend sql commands to be recognized in QFQ vars (have been already subscribed in that way in Manual.rst).

Fixes #6914. Final implemention of customized typeMessageViolation. Incl. unit tests. New escape mode 'C' - escapes ':' by '\'.' - useful for variables in variable definition.

Fixes #7620. Label align left/center/right. Defined by config/form/formelement. FormEditor slightly redesigned.

Fixes #7594: FE.type=extra: don't name it 'type' or 'id' or 'L' - more detailed error message and an explanation in Manual.rst.

Bug 7514. AS ..pdf|..file|..link broken defaults. Refs #7514. Fixes pdf, file. 'link' seems still be broken.

Refactor: Manual.rst update config variables (reorder), add 'qfqLog'. Support.php: formSubmitLog hardcoded to fileadmin/protected/log. DOCUMENTATION_QFQ > SYSTEM_DOCUMENTATION_QFQ. Remove config var 'logDir'.

Manual.rst: update documentation after refactor 'extension/qfq/qfq/...' to 'extension/Source/core/...'. Fixed outdated mail.log statement.