disable hidding checkbox on linux

Author: ddamke

src/main/java/de/doubleslash/keeptime/view/SettingsController.java

@@ -162,6 +162,7 @@ private void initialize() {
          useHotkeyCheckBox.setDisable(true);
          hotkeyLabel.setDisable(true);
          globalKeyloggerLabel.setDisable(true);
+         hideProjectsOnMouseExitCheckBox.setDisable(true);
       }
 
       initExportButton();