Use better description for size when size is not known
Summary:
Show that size is being fetched instead of displaying size 0 which can confuse users. Also
when we fail to fetch the size, then display "unknown size" rather then again showing
that size is 0.
Reviewers: apol
Reviewed By: apol
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D5219