v0.3 - 2020-07-10:

* Use layout management
* Localization support
* Remove "Tracker" option, people can use "open" in their command line instead
* Renamed options to be more intuitive
* Use spinners to enter the count down time
* Drag'n'drop support and folder buttons to choose a command/location
* Add vector icon (based on zuMi's excellent icons)
* Fix: The count down used to be one second late