refs #241

refs #116

refs #116

It’s now possible to assign links to shows and notes.

refs #186

This is helpful if the FormGroup is used as a container for other fields
which may have errors but the root FormGroup is used for propagating a
save state.

refs #186

refs #135 #104

refs #242

refs #181

refs #246

refs #206

refs #206

fixes #169

Apparently there were still usages of the $log object we’ve removed in
52227b1d. We fix that by simply using
window.console.

* can now be used to represent date, time and datetime strings
* does support nullish-values with proper types
  (and adds a corrosponding default value)
* allows timezone offset to be stripped for use
  in datetime-local input fields

refs #177

fixes #100