previous incarnation was woefully lacking. new feature is much more
extensible. still need to remove old POS integration specifics in
some places.
and a couple of unrelated things that snuck in..
- deprecate `rattail.util.OrderedDict`
- deprecate `rattail.util.import_module_path()`
- deprecate `rattail.util.import_reload()`
customer widget is either autocomplete or dropdown, per config
also added a way to pass arbitrary kwargs to the chameleon template
rendering for a field
also moved the logic for rendering a <b-field> out of the template and
into the Form class
also start to prefer `input_handler` over `input_callback` when
specifying client-side JS hook
- invoke vendor handler where appropriate, e.g. for parsers
- reverse "polarity" of dropdown chooser setting; rename it
- tweak autocomplete behavior yet again, for dynamic values
- auto-select vendor upon parser selection, when possible
apparently marking an `<option>` as "selected" does not cut it for Buefy, and
we must bind to a v-model somehow. not real crazy about the current method,
but it does seem to work okay so far...
these changes are all with Buefy "forms" support in mind. hopefully didn't
break any legacy/jquery stuff... and yeah, lots more left to do still for the
sake of Buefy forms
