The spec says:
“Implementations must take care not to expand field codes into multiple
arguments unless explicitly instructed by this specification. This means
that name fields, filenames and other replacements that can contain
spaces must be passed as a single argument to the executable program
after expansion.”
fixes#1240
In addition to 'name' and 'command', add a third entry type 'filename'
to list the filenames of the .desktop files (e.g., 'firefox.desktop'
would be display as 'firefox').
Command line option '--entry-type' can be specified multiple times.
fixes#930
