[UI idea] Improvements to adventures reordering

[jpelay]

Idea incl level After #3854 is merged we need to address these improvements:

Originally posted by @Felienne

Now that we have the new layout, I think we can also move quiz and puzzle into the "dragger" instead of a tickbox below? We need to change the text for the enable/disable buttons (I can do that) If there are no adventures available, can we remove the drowdown? And empty one is a bit weird. We can even consider a button there with "add you own" We now have 2 places for all levels (in addition to the dragger) the top enable/disable and the dates list. Can we make that into one? Maybe just the date lists with a tick mark?

Also we need to add a Cypress test for the new drag & drop functionality!

Additional context Add any other context about the idea here.

[Felienne]

Hi @Annelein!

Maybe many of these (or all?) have been fixed already? If so feel free to close right away.