The K27 browser run now also checks that System structure and Behavior show
no Back of their own, that Plan or 3D in System structure and Behavior is a
step Back restores, that the Behavior path and the operation on the call
chain come back after Back and Forward, and that text typed in the Routes
filter survives an immediate Back. Screenshots reset every scrolled
container so each one shows the subtabs and the history controls.
Signed-off-by: Bernhard Jackiewicz <bj@techport.io>