-The Activity Settings page, allowing to edit Dataset-selection and Options (if any).
-When launched from the menu, if the selected Activity has datasets, it shows by default the Dataset-selection in the main area, else it shows Options content.
-User can navigate between Dataset and Options using the respective buttons at the top.
-The main area can be scrolled if the content is longer, using mouse/touch scroll or the side button.
-each entry can be switched on/off by clicking on the whole line area (icon + text + difficulty level).
-The Maximum difficulty selected entry shows the icon of the most difficult dataset activated. The same icon should be used on the Activity case in the main menu, and for filtering.
-Cancel button: cancel any change made and return to menu (menu in normal mode).
-Save: save all changes and return to the menu (menu in Activity-settings mode).
-Save and Start: save all changes and start the activity. When exiting the activity, return to menu in normal mode.