Reformat Doc. Add per row option default check/uncheck of processRow checkbox. Fix bug that missing F.processRow skip all saves. Fix bug columns '_id' are not handled. Use of HelperFormElement::buildFormElementName(). Rafactor usage of _POST[]. Implement constant  F_PROCESS_ROW_COLUMN.

Update Documentation/Form.rst: Fixed typos

Refs #15036. Rename keywords: subrecordAppendRows > subrecordAppendSql, subrecordAppendRowsClass > subrecordAppendClass, formAdditional > subrecordAppendForm, finalDeleteFormAdditional > subrecordAppendExtraDeleteForm

S15014: Fixed array count error for update statement. Changed usable keyword from noSameRow to append. Implemented new exceptions. refs #15014

F14320: Implemented with C.R. discussed changes.  WIP: Implementing autoloader for htmlPurifier. refs #14320

B8891: Implemented feature for user given doNotLogColumn list in qfq config and form parameter. Value of any column in list will logged be as '*hide in log*'. List default is 'password'.

F14320: Implemented use for library html purifier and finished implementation for new feature htmlAllow. Added documentation for htmlAllow.

F10782: Changed documentation for TinyMce und httpOrigin. Set httpOrigin dynamically via baseUrl. Added implementation for the functionality of drag and drop from images. Refs #14463 Allow statusbar (resize button included) to show as default. Refs #14455 Drag and drop triggers record lock now.

F9052: Minimized codemirror js files and changed Gruntfile function. Added Documentation. Switchable button for edit inline reports implemented.

Problem was a second exception. Prevent throwing 'invalid sip' a second time will show IP/feUser already in first exception handling.

S13787 Corrected qfq-datepicker JS to get min and maxDate work. Added documentation for the possible datetimepicker configurations which can be set.

F10782 TinyMCE: Feature for own base path is implemented. Over forms parameter user can give with 'fileUploadPath=fileadmin/...' own path upload. Documentation for base path file is added.