Update qdirstat to 1.5.

1.5
- (Optional) breadcrumbs navigation
- (Optional) a new "details" panel for the currently selected item
- (Optional) new tree columns: owner, group, permissions both in "rwxrwxrwx"
  and in octal format
- Package manager support for the major Linux package managers (dpkg / rpm /
  pacman) to see what package a system file belongs to.
- Quick-switchable different layouts for the main window
- A new "General" page in the configuration dialog
- Show in the window title if the program runs with root permissions (sudo
  etc.)
- (Optional) show the URL in the window title
- Some bug fixes

1.4
-   File size statistics window with histogram
-   Filling the gaps in the treemap (directories with lots of small files)
-   Checked code with Coverity and fixed all issues it pointed out
-   Improved support for file and directory names with UTF-8 special characters
    (Qt 4 only issue)
-   Improved support for directories that have read, but not execute permissions

1.3
-    File type statistics window
-    Locate files per directory by file type
-    Display path and size of the current item in the status line while
     hovering over a treemap tile
-    Optional alternate layout of the main window: Tree view and treemap side
     by side
-    Improved logging: More secure and rotating logs
-    New document: QDirStat for Headless Servers for server admins
-    New document: The GitHub Workflow for developers

1.2
-    Btrfs improvements

1.1
-    This is mostly a bug fix release with some small features thrown in.


(bsiegert)