F8975: Allowed characters for alias now include '_' and '-'. Added constants and reformatted "Report Notation 2.0" to "Report notation 'alias'". refs #8975

Implements #16584 - FormEditor Report: Default without statistics

See merge request !605

B16573: Fixed wrong built date and datetime string if default value was given. refs#16573

See merge request !602

B16574: Added multiple siteConfigurations compatibility for typo3 v10 and 11. refs#16574

See merge request !603

F8975 WIP: Previously the notation mode was not set correctly because statements such as 'form={{form:SE}}' were not considered while determining the first token. This should now be fixed. The first token gets determined earlier on while joining the lines. Based on this first token the notation mode will be set like before. Added an error "Invalid level detected" which tells the user that an alias was used where it is not allowed. refs #8975

F8975 WIP: "Missing open delimiter" error message is now supported. Added error message "numeric alias detected", which tells the user, that they cannot use a numeric value as an alias. Added error message "double definition", which tells the user, that they used the same alias twice. Added a check that only replaces existing aliases in variables. refs #8975

New version v23.6.4, Refs #16490

See merge request !601

B16488: WIP: JS failure. Changes to test in ik tool dev. refs#16488

See merge request !600

Hotfix mysql error

See merge request !599

New version v23.6.3

See merge request !598

B16478: Fixed stream_get_contents failure in PHP8.1 Generic Error. refs #16478

See merge request !597

New version v23.6.2

See merge request !596

B16475: Catch first all '<br />' strings in sendmail and replace them with...

See merge request !594

Fixes #16476: Default empty string becomes ''

See merge request !595

B16475: Catch first all '<br />' strings in sendmail and replace them with '<br>'. Happens in situations from using tinymce or other potential applications. refs #16475