Merge remote-tracking branch 'origin/F7783FormElementCodeAnnotation' into F7783FormElementCodeAnnotation

Merge remote-tracking branch 'origin/F7783FormElementCodeAnnotation' into F7783FormElementCodeAnnotation

generates new event when new comment is added

generates new event when new comment is added

Merge remote-tracking branch 'origin/F7783FormElementCodeAnnotation' into F7783FormElementCodeAnnotation

Merge remote-tracking branch 'origin/F7783FormElementCodeAnnotation' into F7783FormElementCodeAnnotation

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.

Refs #7743. Move error mesages to Constants.php. Unit tests use those constants now. 'data-pattern-error' only delivered if a 'pattern' is given. 'required' attribute only delivered is set.

Refs #7743. Detection of 'pattern error' on per QFQ default, custom instance wide, per form or per FormElement - per FormElement overwrites other. System specific generated overwrites QFQ static default, instance wide default. Move default pattern to constants.

Refs #7743. Add unit tests. Make default error text more specific (only if default error text is not explicit set in config, form or form-element)