Refactor screens mementos and screens tabs

* avoid using so many records, reducing the compiled size a bit since Java generates a lot of bytecode with records
* store the mementos in the FzmmHistory class, avoiding having them distributed as a static in each one
* remove the memento and tab logic from BaseFzmmScreen
* replace ScreenTabRow in favor of TabContainer, allowing tabs to be a bit more flexible
* change the tabs background