Tested that setting null as look and feel makes swing unable to function, so validating that instead of potentially returning null from uitools
Adding tests of the ok button
Fixing nullpointer in one of the tests because of NetworkChoiceCellRenderer on Windows, and adding several tests of showSettings
Adding last tests of showSettings
Adding tests of more buttons
Adding a method on uitools to run commands, to avoid static usage
Adding a method on uitools to browse, to avoid static usage
Adding the last missing tests of settings dialog