Enhancements and improvements:
- Mask to insert and edit placeholders added.
- Network folders and standard folder "Pictures" are shown in folder tree.
Following errors are corrected:
- Program crashed during multi-edit, if comment was not filled and "append comment" was selected.
- Program crashed after multiple pressing Ctrl-A in file list.
- Export of properties with several values (e.g. of type LangAlt, XmpSeq) was incomplete.