FormAction.php, QuickFormQuery.php: fixed new implemented error - calling 'Evaluate->parse()' with ROW_EXPECT_0_1 returns only an array, not an array of arrays.

stat(): throws an exception, if file does not exsist - implement file_exist() before doing a stat().

ErrorHandler.php: raise an error as an exception has been stopped in mid 2017 - don't know why, reactivated now.

Fix problem in upload elements: a) in exception FE_ID was not reported, b) fillStoreVar was not fired.

Evaluate.php, QuickFormQuery.php: 1) split exception in user/support, 2) start to implement that '!' in '{{!...' is not necessary anymore. Implemented for 'fillStoreVar' in FE Action elements.

Fixes #7001 - Error message: if 'modeSql' fails, error message does not contain a reference to the causing FE.

Fixes #6866: On logout destroy STORE_USER. Session.php: check if _COOKIE['fe_typo_user'] has changed - yes: clear STORE_USER. Store.php: Rearrange functions.

Fixes #7407: MariaDB / Ubuntu 18 complains about missing values if column of type TEXT isn't explicit specified in INSERT. New default for database.init=SET sql_mode = "NO_ENGINE_SUBSTITUTION"

Manual.rst: Change _Paged to _paged in FormEditor example. Remove description to never implemented <level>.db. Add report keyword description <dbIndex>.

F4906 Php Session Timeout: can be specified globally in configuration and per form. Affects only logged in FE User.

Logger.php: remove UserAgent - that one is logged in FormSubmitLog Table. Add 'cookie' to filter individual actions.

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