F10782: Implemented pictureUpload.php functionality in Class File. Upload is now handled by API file.php. Added feature for function updateT3QfqConfig, possible to give config array or key. updateT3QfqConfig is handled over bool variable. Function getUniqueFileName is now in HelperFile Class. Optimized set of baseUrl.

F12630: Added code commentary. Reformatted code. getUniqueFileName function changed. New logFileMessages implemented. Awaiting feedback.

Refs #12630. Fallback cascade of dateTimePickerType (Config > Form > FE) fixed. Refactor to use existing logic.

F12630: Extended compatibility with user given time format. Format HH:mm:ss activates field showSeconds. Record lock function for changing seconds and correctly shown arrows for seconds implemented.

F12630: Changed some functions for save behaviour. Did a lot of tests. Final version 2 of datepicker.

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.