Misc updates to assess and items assess demos

Added:

 - assess_inline flag
 - ondiscard_redirect
 - value
 - scroll_to_test and scroll_to_top in customise modal
Removed config flag, should be query string param
Incrementing patch version for data api
Fixed toolbar in items branching, removed patch for data api (only need minor)
Fixed broken activity chooser
Added custom accessibility showcase demo
Merge from lndash