[balooctl] Use more understandable names for size in status output
Summary:
Actual and expected size are somewhat hard to understand, while
"File Size" and "Used" are hopefully much clearer.
Reviewers: Baloo, Frameworks, ngraham, astippich, poboiko
Reviewed By: Baloo, ngraham
Subscribers: kde-frameworks-devel
Tags: Frameworks, Baloo
Differential Revision: https://phabricator.kde.org/D20458