Log Message:
qdirstat: update to 1.8.

The QDirStat project proudly presents its latest release: QDirStat
1.8.

This is a stable release. It brings a some new features and bug
fixes:

    New view: File Age Statistics

    Navigation history like in a web browser (Back, Forward)

    Bug fixes

    Some small improvements

Details

New view: File Age Statistics

This shows the number of files per year and/or per month that were
last modified in that year or month, together with the total size
of those files and a percent bar for both (number and total size).

This view is extensively documented in the File Age Statistics
Document.

Navigation History

This implements a navigation history for directories like in a web
browser:

    New buttons Back / Forward in the tool bar

    Standard keyboard shortcuts [Alt] [Cursor Left] / [Alt] [Cursor
    Right] like in all common web browsers

    Support for Back / Forward mouse buttons if the mouse has them

    History menu on those buttons (long press on the buttons) for
    the last 16 directories

Bug Fixes

    Fixed GitHub issue #169:  Shorten path components in the
    breadcrumb widget for insanely long paths.

    Now closing a left-over Permissions error panel when refreshing
    from disk: After the re-read, the permissions error may no
    longer be there.

Other Improvements

    In the Mounted Filesystems window, don't show inactive mounts
    managed by the automounter anymore.

    In the Open Directory window, automatically open the first
    directory level if a path was clicked in the Places list on
    the left, and scroll the tree on the right so that path is at
    the top.

    Added a little margin to the left in the main window's tree
    view for the Size column so it looks now less cramped.

    Internal restructuring and refactoring to keep the code
    maintainable.