widget as a custom nextmatch header
Allows eg. in InfoLog to search and then filter by any linked entry of an other application:
- Infologs linked to a project or
- Infologs linked to a contact
- if file already exists, show download and delete link
- if file does NOT exist, show upload box
Name or value of widget is either:
- vfs path or
- $app:$id:$relative_name (if empty($id) a temporary directory in users
home directory is created and application is responsible to move
content of that directory to the entry directory (/apps/$app/$id)
