in the provider we accidently flattend out the widget history by
returning the wrong parent. However, this flattening code was required
for the element focus code of the two generic widgets, so the item is
found for every widget, in every subtree.
#finally
For now we focus the widgets of a item, the item content can be cycled
by tab / Ctrl + tab. up/down/right/left are for now handled by gengrid
and move the focused item (everything else feels super weird with
multiple contents in a item)
ref T6181