Ukopp 4.1

This release has many small improvements in usability and a few minor error corrections.

• At startup, inform if ukopp is running as root or not.
• If backup and verify are done together, report both statuses at the end.
• If target directory does not exist, warn and offer to create it.
• Better visual separation of fields in target chooser dialog.
• Clarify the backup menu as "backup (no verify)".
• Widen the input fields in the target chooser dialog.
• Change the mouse pointer into a clock during a long-running function.
• Stop the job name from disappearing from the main window title.
• "include /aaa/bbb" is equivalent to "include /aaa/bbb/*" if bbb is a directory.
• Expand the input fields along with the window in restore files dialog.
• Restore original target device and directory if edit job is canceled.
• File names can be quoted to handle files ending in a blank character.
• Some error messages were improved, and dialogs kept open for easier correction.
• The file chooser dialog no longer hides the restore files dialog.
• New report: summary statistics for new/modified/deleted files by directory.
• The tolerance to consider a backup file to have the same modification time as its source file was increased from 1 to 2 seconds. This is because the Microsoft FAT time resolution is 2 seconds. 
• All error messages are now shown in the main window (not in a log file).
• Bugfix: purge expired backup versions also for unchanged files NOT being copied.
• Prevent Choose Target and Edit Job dialogs from running in parallel.
• Many small improvements were made to the user guide.