Refactor remaining reuse dialogs into FX style (resizable, better text wrap, etc.) and improve code quality for action classes
Do the same as in #4265 (closed) but for all the other window dialog boxes in the reuse plugin. Not everything can be reused, because some are error or warning boxes (and not information boxes) and some do not need scrollbars but selection menus, etc.
However, the aim is that all should have the same new FX look of javafx.scene.control.*, e.g., javafx.scene.control.Alert.
While doing this, it should be checked that all the action classes in the commands package are refactored regarding method length and code duplication (TODOs are added).
Edited by Sebastian Bergemann