disable tabular basal settings by default; show them with ?showbasalsettings[=true]

@nicolashery or @jh-bate have a look-see please :)

Naming of variables etc. by no means set in stone. Feel free to change.

Expected behavior: no tabular basal settings by default.
If `?showbasalsettings` or `?showbasalsettings=true`, you get the show/hide norgie (NB: before the hash like so http://localhost:3000/?showbasalsettings=true#/patients/11/data)
If `?showbasalsettings=false`, they are disabled again.