I will report development progress here.
first menu transition animation prototype:
I actually want a "swipe" or "push/slide" effect instead of a wipe and in the end it shall be much faster of course but one thing after the other.
This video is a bit longer and gives a full tour of the current state of development:
Fixed the parameter menus, added "up" items in submenus, they now also do not show the ">" arrow on the right as "up/back" is perceived as left, slide up/down animation added for whitebalance page. The currently highlighted/selected item in each menu/submenu is now saved and if you go out of a submenu you now have the item selected that led you into the submenu.