events: fix for moving buttons with arrow keys when selected
animations: cleanup
lists: morphlist style fix
lists: extracting the list classes into own module
lists: introducing new list prototype (and hooking it up)
list: MorphList>>moveItemToIndex and MorphList>>find fix
lists: MorphList -- submorphs of list item morphs can have the flag
`hasOwnListItemBehavior` set to true. With that they will be able to handle
events themselves. Usful e.g. to embed a button inside a list element.
list: testMoveItemToIndex for MorphList