M11

Note from Detlev: Ensuring that the interface can be used with a bluetooth keyboard - there is probably not a lot authors can do beyond using native controls as advised in "G202: Ensuring keyboard control for all functionality" or making things keyboard accessible as describered in SCR2, SCR20, SCR35" Incorporate into the general technique: we need to add to the general reminder that there is keyboard access for mobile - add user agent notes about keyboard