Changes:
* A new GUI that integrates Filer and AutoFiler settings.
* Change to the action names, rule settings have to be created anew.
* Some usability improvements like drag&drop support for AutoFiler folders and a
tooltip for actions in the rule editing window.
* Apply changed settings, rules and monitored folders live.
* Add a button to manually start/stop AutoFiler.
* Add a dropzone and make it replicatable.
* Add an option to stop matching rules after the first match was found (idea and
code by Pete Goodeve).
* Add user documentation.
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